nRF5 action!
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@d00616 said in Minimalist SAMD21 TQFP32 Pro Mini:
Thanks for your post!I have all three supported programmers working.
It's great that you have that perspective to share. Which of the three do you most prefer, and why? Also, if picking one for use under a Windows environment, which would you recommend most?
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
It's great that you have that perspective to share. Which of the three do you most prefer, and why? Also, if picking one for use under a Windows environment, which would you recommend most?
The J-LINK is integrated into my nRF51 Dev Boards. Arduino-nrf5 uses openocd but I have also used the original software. The CMSIS-DAP is part of some RedBear boards I use.
For any other board without an integrated programmer I use the cheap ST-Link clones and an extra USB to 3.3V serial converter. Be careful I have two versions looking identical but with completely different pin assignments.
The arduino-nrf5 cannot address different devices. This is the reason I like to use different programmers. I can connect two devices and address them by choosing another programmer.
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Just received my nRF52832 DK, and it included 5 additional nrf52832 chips in it. Wasn't even expecting that.
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First impression after a quick looking it over: other than having a built-in J-Link, it looks like the DK will be of no extra benefit with respect to the mysensors nRF52832 implementation.
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@NeverDie why won't it be helpful?
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@Terrence
Since it has a built-in J-Link, it should be helpful in programming the nrf52832 that's already soldered onto the DK. However, will it be helpful in programming an off-board nrf52832 like the adafruit board or, say, the sparkfun board? I don't know.Maybe I haven't found the right starting point. I went to the url given on a small card in the DK, but it's mostly links to datasheets, white papers, app notes, a couple phone demo apps, software that can be downloaded, etc. I'm not finding a tutorial. Contrast that to what, for example, cypress semiconductor has for their bluetooth evaluation board, which is a whole video series of something like 50 video tutorials that walks you through from A to Z on how to use it.
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I'm finally able to get some primitive sketches (such as Blink and printing to Serial) to run on the NRF52 DK using these settings:
Somewhat strangely, setting the LED pin LOW turns the LED to "ON", and setting it HIGH turns it OFF. Go figure.
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
Contrast that to what, for example, cypress semiconductor has
Wow, cypress is knocking it out of the park on helping us. You would think Nordic would pick up the pace.
Thanks. I will check those videos out.
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OK, using the mysensors example scripts, I have the nRF52832 serving as a serial gateway, and it is receiving messages from an nRF24L01 light sensor that's running on an arduino UNO.
So, apparently, it works.
Anyone know whether the nRF52 DK can be used to program other nRF52832's? If not, I guess I'll have to wait for the J-Link programmer I ordered to test out that part of it and get nRF52832 to nRF52832 communication working.
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Here's the really good news. I tried a very quick range test with the above configuration, and it seems to be noticeably better than with two nRF24L01's. I check the datasheets, and, indeed:
nRF24L01: -85dBm sensitivity at 1Mbps
nRF52832: -93 dBm sensitivity, 1Msps nRF modeSo, for an nRF52832, that's an 8dBm improvement in link budget just from improved sensitivity alone. i.e. more than twice the range. Nice.
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Looks as though the nRF52840 will have the same nRF mode receive sensitivity. However, it will have a receive sensitivity of -103dBm in 125ksps BLE mode. which is huge.
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It's somewhat strange that the F-antenna never caught on with the nRF24L01, which typically used some kind of meandering antenna.
However, as proven by the ESP8266's evolution, the F-antenna is superior.
So, its presence in at least some of the nRF52832 implementations (such as that pictured below) should help as well.
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I found it on some modules from Sunfounder on red PCB but they have fake nrf24 chip and still performed bad but a little better than the other chinese clones (range 7 meters indoor instead of 5)
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Presently the parts cost is higher for an nRF52832 (and surely for an nRF52840) than for an RFM69 plus an atmega328p. So, I'm struggling to justify it.
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
Presently the parts cost is higher for an nRF52832 (and surely for an nRF52840) than for an RFM69 plus an atmega328p. So, I'm struggling to justify it.
With only 5$ for the EBytes modules there's not much difference I think ? And for that you have a smaller size, easier soldering (compared to SMD atmega), incredibly more capable hardware that's really future proof for both MCU and radio module, lower power consumption for TX and even more for RX, ...
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@Nca78
You're right. Especially after outfitting the atmega328p with an RTC, the cost is more of a wash. I think the RFM still wins on range, but maybe the 832 will be "good enough"...
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I'm guessing that if I were to desolder the rFM52832 from the DK, then I could use the DK to program other chips using the SW pins by using the J-link that's part of the board.
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@gohan said in Minimalist SAMD21 TQFP32 Pro Mini:
I found it on some modules from Sunfounder on red PCB but they have fake nrf24 chip and still performed bad but a little better than the other chinese clones (range 7 meters indoor instead of 5)
Interestingly, the antenna on the DK is sort-of hockey stick shaped. I guess they didn't need to compress it, since the board is so large anyway.
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am reading your findings with great interest. Thanks for the updates.
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
You're right. Especially after outfitting the atmega328p with an RTC, the cost is more of a wash. I think the RFM still wins on range, but maybe the 832 will be "good enough"...
The question is, when 832 modules are available. After announcing the nRF52832 with its preview DK, I have waited from 06/2015 to 08/2016 until modules are available for an acceptable price at aliexpress or ebay.
I think the atmega is a slow 8-bit MCU with less RAM. The limited RAM requires to transmit additional nonce packages, when signing is enabled. SoftSigning hashing is 76 times faster. A faster CPU allows to shorten the active time:
- atmega328 14000µs
- nRF51 1739µS
- ESP8266 380µS
- nRF52 183µS
The NRF24 has problems with clones, range and the limitation of packages to 32 bytes. The nRF52 allows to change the packet format to support >32 bytes packages.
At the moment sleep modes are only implemented for 328 and nRF5.
OTA updates are available for 328 and ESP8266. For nRF5 it requires to implement a boot loader. The internal flash should have enough capacity to store a simple bootloader and a firmware update.
If you plan to do a lot of writes into EEPROM the 328 has a real EEPROM. The SAMD requires an external EEPROM, the nRF5/Teensy/STM32F emulating the eeprom in Flash. The nRF5 is using the NVM driver, which allows much more writes to the emulated EEPROM. The price for NVM is some time for log cleaning after some hundreds writes.
IMHO the best MCU for creating new battery powered sensors is the nRF5 stating with a ~3€ board, if required in combination with RFM modules.
@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
I'm guessing that if I were to desolder the rFM52832 from the DK, then I could use the DK to program other chips using the SW pins by using the J-link that's part of the board.
I think it's simpler to use one of the ST-LINK v2 clones. The DK board should be good for development, debugging and current measurement.
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@d00616 said in Minimalist SAMD21 TQFP32 Pro Mini:
I think it's simpler to use one of the ST-LINK v2 clones. The DK board should be good for development, debugging and current measurement.
What exactly do I need to do to get it work? I tried it from Windows, and failed. I seem to recall you said you got it to work from Linux after changing a definition. Would you mind showing the steps, or providing a link on how to do that?
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@d00616 said in Minimalist SAMD21 TQFP32 Pro Mini:
IMHO the best MCU for creating new battery powered sensors is the nRF5 stating with a ~3€ board, if required in combination with RFM modules.
The board you linked to is an nRF51. Which do you prefer? nRF51 or nRF52?
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Looks as though the nRF52832 beats the nRF51832 on Rx sensitivity at 1mbps. The nRF51832 is:
• -90 dBm at 1 Mbps
versus -93dBm at 1Mbps for the nRF52832.On the other hand, the nRF51832 has -96dBm receive sensitivity at 250kbps, and the nRF52832 appears to lack that mode altogether. So, in a way, that make sthe nRF51832 seem a bit more attractive on range, even if one has to pay a price on bitrate.
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@d00616 Now that you mention it, that board you linked to ( https://www.aliexpress.com/item/BLE4-0-Bluetooth-2-4GHz-Wireless-Module-NRF51822-Board-Core51822-B/32633417101.html?spm=2114.search0104.3.18.Q9naea&ws_ab_test=searchweb0_0,searchweb201602_5_10152_10065_10151_10068_10130_10084_10083_10119_10080_10082_10081_10110_10178_10136_10137_10111_10060_10112_10113_10155_10114_5360016_10154_438_10056_10055_10054_10182_10059_100031_10099_10078_10079_10103_10073_10102_10120_10189_10052_10053_10142_10107_10050_10051,searchweb201603_5,ppcSwitch_4&btsid=f45d662b-6a09-4449-9bee-1ea58d9beab8&algo_expid=53f99b5d-bb10-4b34-a548-2a3e4c0cd96e-2&algo_pvid=53f99b5d-bb10-4b34-a548-2a3e4c0cd96e ) would be an interesting way to control an RFM69, especially if it could do an OTA sketch uploade. Can it?
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
The board you linked to is an nRF51. Which do you prefer? nRF51 or nRF52?
I prefer to use nRF52 controllers when the price doesn't matter.
@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
Now that you mention it, that board you linked to would be an interesting way to control an RFM69, especially if it could do an OTA sketch uploade. Can it?
OTA sketch upload is on my todo list, but not at the first position
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
On the other hand, the nRF51832 has -96dBm receive sensitivity at 250kbps, and the nRF52832 appears to lack that mode altogether.
The 250kbps mode is working with the nRF5232 but this was the last chip supporting this mode.
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This module is interesting because it looks as though it would be relatively easy to attach to most simple sensor projects:
https://www.aliexpress.com/store/product/NRF52832-Bluetooth-4-2-module-Bluetooth-5-program-PCBA-serial-transmission-cost-effective/1383441_32818791344.html
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I found some useful connectors:
1.27mm pitch seems to be what's most common with nRF52 stuff.
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what would you use those connectors for?
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@gohan said in Minimalist SAMD21 TQFP32 Pro Mini:
what would you use those connectors for?
The J-Tag ones for connecting a J-tag programmer to an nRF5 board (e.g. the adafruit one has holes for such a 2x5 connector already on its PCB).
The 1.27mm headers I think I might use for connecting some of the small nRF5 boards which have 1.27mm pitch through-holes onto some prototypes rather than just soldering them down. That way I can easily move them to the next version of the prototype without creating a lot of desoldering work.
I've ordered all of the above earlier today. I'm just providing the links in case others may want to do the same.
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@NeverDie Thanks for the nrf link, but I liked the units with coin cell better. I purchased 2.
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Attractive form factor, but I believe that it's just a beacon. If not, how do you connect it to anything?
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@Terrence said in Minimalist SAMD21 TQFP32 Pro Mini:
@NeverDie Thanks for the nrf link, but I liked the units with coin cell better. I purchased 2.
This module looks great. Both oscillators and the inductor is placed ob board. But the SWDIO and SDCLK are not connected. You can only flash via OTA update. Don't flash MySensors until you have moved the used Flash by NVM driver. The NVM would overwrite the DFU bootloader. It's possible that the nRF5 code needs changes to support running on an nRF5 with Softdevice.
@scalz is playing/plans to play with Nordics OTA update.
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A couple more interesting finds.
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This one is small but includes a PA, so you can allegedly get 20dBm+ in TX:
https://www.aliexpress.com/item/PTR5618PA-Nordic-nRF52832-Module-PA-module-BLE-4-0-Module-Free-shipping/32761051086.html?spm=2114.search0104.3.9.W4RMn3&ws_ab_test=searchweb0_0,searchweb201602_5_10152_10065_10151_10068_10130_9947_10084_10083_10119_10080_10082_10081_10136_10110_10178_10137_10111_10060_10112_10113_10155_10114_10154_438_10056_10055_10054_10182_10059_100031_10099_10078_10079_10103_10073_10102_10120_5360020_10189_10052_10053_10142_10107_10050_10051-9947,searchweb201603_5,ppcSwitch_4&btsid=66711830-6dac-41e4-9674-fe24475ac9f5&algo_expid=4a176404-eb42-4313-9eae-531e59e60ccf-1&algo_pvid=4a176404-eb42-4313-9eae-531e59e60ccf -
This one allegedly includes not only a PA, but an LNA too:
https://www.aliexpress.com/item/nRF52832-LNA-PA-Range-Extension-EV-Board-best-sol-for-the-coming-Bluetooth-5-0-and/32778491443.html?spm=2114.search0104.3.2.W4RMn3&ws_ab_test=searchweb0_0,searchweb201602_5_10152_10065_10151_10068_10130_9947_10084_10083_10119_10080_10082_10081_10136_10110_10178_10137_10111_10060_10112_10113_10155_10114_10154_438_10056_10055_10054_10182_10059_100031_10099_10078_10079_10103_10073_10102_10120_5360020_10189_10052_10053_10142_10107_10050_10051-9947,searchweb201603_5,ppcSwitch_4&btsid=66711830-6dac-41e4-9674-fe24475ac9f5&algo_expid=4a176404-eb42-4313-9eae-531e59e60ccf-0&algo_pvid=4a176404-eb42-4313-9eae-531e59e60ccf
Awfully expensive though.
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@NeverDie Yes, I got to thinking about that after I pulled the trigger.
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@d00616 Thanks.
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Lastly, I'm quite intrigued by this one, which is an nRF51832, because it is only 11.4mmx9.5mm in size:
https://www.aliexpress.com/store/product/PTR5528-Fingertip-size-nRF51822-Module-Ultra-Low-Power-Bluetooth-4-0-Low-Energy-RF-Module-Free/130096_1705429590.html?spm=2114.12010108.0.0.TRBTKqHas anyone seen anything else which is that small or even smaller?
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@Terrence
Maybe you'd like this one (or similar) a little better, as it has some additional sensors already built into it:
https://www.aliexpress.com/item/Free-Ship-Bluetooth-4-0-temperature-sensor-pressure-sensor-acceleration-sensor-gyroscope-light-nRF51822-bluetooth-4/32705653095.html?spm=2114.10010108.1000013.6.5TTgVd&traffic_analysisId=recommend_2088_3_82199_new&scm=1007.13339.82199.0&pvid=71d80c46-bd50-4ed5-bdc6-1d6253d9e038&tpp=1
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
What exactly do I need to do to get it work? I tried it from Windows, and failed. I seem to recall you said you got it to work from Linux after changing a definition. Would you mind showing the steps, or providing a link on how to do that?
I have updates my documentation: https://www.openhardware.io/view/376
I have tested all three programmer types with Windows 10. It looks like Zadig installs the correct drivers for J-Link and ST-Link adapters. The CMSIS-DAP requires the serial driver from mbed.
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@d00616
Thanks! I had been using a computer running Windows 7, and I got no joy with Zadig and st-link v2 on that. However, you just now mentioned Windows 10, so I'll give that a try.
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
Maybe you'd like this one (or similar) a little better, as it has some additional sensors already built into it:
This is the discussion to this board: https://forum.mysensors.org/topic/6951/nrf5-multi-sensor-board-12-14/1
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
hanks! I had been using a computer running Windows 7, and I got no joy with Zadig and st-link v2 on that. However, you just now mentioned Windows 10, so I'll give that a try.
I think the best option for beginners is to use an CMSIS-DAP/DAPLink adapter. Firmware and drivers are open source and there is an integrated serial port.
The ST-Link adapter is initialized with an ST-Link driver by libwdi. If you have luck you can find an old variant.
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
Has anyone seen anything else which is that small or even smaller?
Yes. 9x9mm with antenna: https://de.aliexpress.com/store/product/PTR5628-Nordic-nRF52832-Module-BLE-4-0-Module-Free-shipping/130096_32760971926.html but photo and product description are different. I had a discussion with the manufacterer end of 2016 at this time the module was shown as 9*9mm module. The PTR5628 has no 32kHz oscillator, you have to use the unprecise RC oscillator.
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@d00616
9mmx9mm would be great. However, are you certain? Product description says 15.4mmx15.4mm.Pitty the lack of 32khz crystal, but for a lot of sensor nodes perhaps it won't matter much.
I did find this after making my prior post:
https://www.aliexpress.com/item/nRF51-M0-Ultra-small-Bluetooth-BLE-Module-4-0-Module-LIS3DH-Support-10-GPIOs/32697055436.html?spm=a2g0s.13010208.99999999.295.t9NHvJ
which is allegedly 8.5mmx10.5mm and allegedly does have a 32Khz crystal, but the trade-off is that it's an nRF51832, not an nRF52832.
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@d00616 said in Minimalist SAMD21 TQFP32 Pro Mini:
I think the best option for beginners is to use an CMSIS-DAP/DAPLink adapter.
Thanks for the tip! Based on your recommendation, I ordered this:
http://www.adafruit.com/product/2764
because I could expedite the shipping.Hopefully it works.
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@d00616
The smallest size I found was this:
https://www.aliexpress.com/item/Bluetooth-UART-Wireless-Data-Transceiver-DA14580-Module-for-Arduino/32666222427.html?spm=a2g0s.13010208.99999999.284.fiUAYv
It's just 5mmx6.2mm! So, at least the size is very much awesome. It does have an M0 Cortex core, but it's not a Nordic Semi chip: http://www.dialog-semiconductor.com/sites/default/files/da14580_ds_3v4.pdf
so I have no idea if, or to what degree, it can be easily programmed from within the familiar Arduino IDE the way the Nordic chips apparently can. Do you happen to know if it would be trivially easy? Or would getting it to work be a project unto itself?
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@gohan said in Minimalist SAMD21 TQFP32 Pro Mini:
what would you use those connectors for?
Once outfitted with the connectors, the modules should then fit quite easily into these for prototyping:
https://www.aliexpress.com/item/6-X-8CM-spacing-1-27-universal-board-thickness-1-6mm-sided-HASL-PCB-test-board/32774106087.html?spm=a2g0s.13010208.99999999.288.lLgJVvNot sure if there exist 1.27mm pitch breadboards, but I haven't found any on Aliexpress.
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
It's just 5mmx6.2mm! So, at least the size is very much awesome. It does have an M0 Cortex core, but it's not a Nordic Semi chip: http://www.dialog-semiconductor.com/sites/default/files/da14580_ds_3v4.pdf
so I have no idea if, or to what degree, it can be easily programmed from within the familiar Arduino IDE the way the Nordic chips apparently can. Do you happen to know if it would be trivially easy? Or would getting it to work be a project unto itself?Didn't check in detail but Nordic uses "soft devices", and that's what is compatible with the Arduino platform. That's also why it can work on both NRF51 and NRF52.
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Unfortunately, I don't think the da14580 will work with the current mysensors library: it appears to be bluetooth only. I only did a quick speed read of its datasheet, but I didn't see any mention of the Nordic proprietary modes (or anything like them) that the mysensors library relies on.
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I have ordered one like this. It's pretty small already, less than 2*1cm :
https://www.aliexpress.com/item/nRF51822-04-BLE4-0-WIFI-Wireless-Bluetooth-Module-TTL-Low-Power-Consumption/32682158906.htmlIt has very limited I/O and is made to be used in addition to a MCU using UART to communicate, but the SWDIO and SWDCLK pins are broken out so I will see if I can reprogram it.
It has a datasheet to at least get a valid footprint (as I don't plan to use the serial protocol) :
https://4tronix.co.uk/picobot2/WT51822-S4AT.pdfAnd it has been featured on Nordic's website where they say it's supposed to have FCC certification (and CE too, but that's just declarative...).
http://www.nordicsemi.com/node_206/node_305/Product-Related-News/Nordic-powered-Bluetooth-Smart-module-simplifies-development-of-wireless-wearables-toys-and-smart-home-solutionsThey also claim a 50m range which is way better than the 10m of the da14580 you link above.
So if it can be reprogrammed without problem it looks like a perfect candidate for basic nodes like door, I2C etc
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Both the price and size are certainly nice. I think d00616 would probably point out that it lacks a 32Khz crystal, but since I lack experience with the nRF5's, I don't know how significant that is or isn't. Anyone know?
BTW, it would also be nice to know whether or not the OTA sketch upload capability will work on an nRF51, or only an nRF52 (and also whether it will work on an nRF52832 or only the future nRF52840). Anyone know?
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
Both the price and size are certainly nice. I think d00616 would probably point out that it lacks a 32Khz crystal, but since I lack experience with the nRF5's, I don't know how significant that is or isn't. Anyone know?
Right, it sucks for low power at it needs recalibration every 4 seconds to stay accurate enough, generating 10uA extra consumption. But I'm not sure if this is needed for bluetooth only (because it has to wake up regularly and listen during a precise time window), or also for "nrf24" mode because in that mode we don't need to be precise or regular listenin.
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
BTW, it would also be nice to know whether or not the OTA sketch upload capability will work on an nRF51, or only an nRF52 (and also whether it will work on an nRF52832 or only the future nRF52840). Anyone know?
Nordic's DFU bootloader is also working with nRF51 chips. https://devzone.nordicsemi.com/documentation/nrf51/4.4.1/html/group__bootloader__dfu__description.html
At the moment the MySensors implementation is not compatible with a SoftDevice. This requires to change interrupts, use some SoftDevice system calls and move the NVM driver Flash area out of the DFU bootloader area.
I have started a new thread for OTA update discussion: https://forum.mysensors.org/topic/7146/nrf5-ota-updates
@Nca78 said in Minimalist SAMD21 TQFP32 Pro Mini:
Right, it sucks for low power at it needs recalibration every 4 seconds to stay accurate enough, generating 10uA extra consumption. But I'm not sure if this is needed for bluetooth only (because it has to wake up regularly and listen during a precise time window), or also for "nrf24" mode because in that mode we don't need to be precise or regular listenin.
That's correct. If required, the calibration task must be implemented or is part of the SoftDevice. At the moment the radio doesn't require a precise RTC for nRF24 compatibility. For battery powered sensors listening for commands a time slotted protocol is required. Then this protocol relies on a precise RTC.
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I'm leaning more toward the nRF52 platform over the nRF51, in part for its superior range but also because I'm guessing it will be a little easier for the person who is implementing the OTA sketch uploads to implement it first on an nRF52 (more resources, less constrained).
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So, is the speed of the Cortex on an nRF5 already good enough that one can simply emulate an atsha signing component, and thus that part now completely disappears from the BOM?
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@NeverDie you can run soft signing on any device. It emulates the atsha204a equally well. The performance of the MCU only affects the speed of the calculations, not the quality of the result.
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@NeverDie but remember that if you use soft signing it is your own responsibility to protect the hmac key from readout by an attacker with physical access to the device.
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@Anticimex said in Minimalist SAMD21 TQFP32 Pro Mini:
@NeverDie but remember that if you use soft signing it is your own responsibility to protect the hmac key from readout by an attacker with physical access to the device.
Thanks! Good to know. Speaking only for myself, I don't think I'll be losing any sleep over the prospect of an attacker gaining physical access to one of my home devices with the intent of extracting the hmac key. I'm more likely to win a lottery than have that happen--and I don't even play lotteries.
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@NeverDie that is probably correct, I just feel a responsibility to inform everyone of any known weaknesses in the security infrastructure
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@Anticimex
I don't mean to trivialize it. For commercial applications, the atsha204a would of course make sense.But, at least for now, it sounds likely that $2.73 will buy you the hardware for a nice little home wireless node, minus sensors and power supply. That's today's price for a NRF51822-04 MINI that NCA78 linked to above. And, of course, that price will continue to drop. Pretty cool!
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Which library is most recommended for exploiting the RTC that's on an nRF52832? Likewise, what's the best library for sleeping the nRF52832? Since I have the DK, I'd like to take some current measurements while running some demo code for that. That will establish a baseline for comparing future measurements.
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I just now ordered this:
https://www.sparkfun.com/products/13746?_ga=2.39569123.1141912816.1499956888-1087552930.1495048698It's like a regular FTDI, but it can also power your project at 3.3v at up to 600ma!
Previously I had to make my own hacked FTDI interface to do that. Ordinary 3.3v FTDI's will burn out under the load of, say, an ESP8266, or a 20db Tx power amplified nRF24L01.
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
Which library is most recommended for exploiting the RTC that's on an nRF52832? Likewise, what's the best library for sleeping the nRF52832? Since I have the DK, I'd like to take some current measurements while running some demo code for that. That will establish a baseline for comparing future measurements.
Sleeping is implemented by hwSleep(). This function uses one RTC. If you need advanced RTC access, you have to cooperate with this RTC, because the interrupt routine must reset the state registers. On nRF51 the other RTC is used for millis(). The nRF52 has one RTC free.
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In case anyone else either has, or is thinking of getting, the nRF52832 DK, it looks as though there is indeed a way to use its programmer to program an offboard nRF52832 without desoldering the nRF52832 that's on the DK. Here's the existence proof photo where an 832 DK is being used to program Sparkfun's nRF52832 breakout board over the two SW lines:
The caption reads "For faster programming, an nRF52832 Development Kit can be used to program the nRF52832 Breakout Board."
I haven't yet found the instructions on how to do it though.
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
@d00616
9mmx9mm would be great. However, are you certain?I'm convinced! I pulled this picture off the FCC website, and, indeed, it is 9x9mm:
(https://fccid.io/2AA72-PTR5628)So, thanks for mentioning its size, or else I never would have known!
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So, what's the smallest nRF52 module that also includes a 32Khz crystal? I think I might want to standardize as much as possible on a single module rather than juggle a bunch of different ones.
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
So, what's the smallest nRF52 module that also includes a 32Khz crystal? I think I might want to standardize as much as possible on a single module rather than juggle a bunch of different ones.
What do you think about creating an table with known modules including integrated hardware, available ports and size?
I think, most small modules comes without 32kHz crystal. This is mostly an option. Maybe for the 9x9mm module. But I think the antenna is no good choice for indoor usage.
I have a lot of RedBear BLE Nano 2 (18x21mm) modules. It's complete including 32Khz crystal and a 3-13V voltage converter. With 2.54mm pins it's easy to solder.
I have asked the manufacturer(cdebyte) of the nice nRF24 and nRF52 modules if it's possible to build an module including the nRF52, an RGB LED, an button and 5V protected inputs with the layout like the popular nRF24 modules plus two optional pins (6/8 IO Ports!). I think such type of nRF52 module makes it easy to migrate to 32 Bit using existing boards or build new boards.
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I just now noticed that Ebyte also has a storefront on aliexpress.
https://cdebyte.aliexpress.com/store/2077046?spm=2114.12010108.0.0.7Yid4a
For me, it's much better than ebay, because it includes free e-packet delivery to the US. So, unlike ebay, I will hopefully get their modules much sooner than September! The estimated delivery time from Ebyte if ordered through Aliexpress is 12-20 days.
https://www.aliexpress.com/store/product/CDEBYTE-E73-2G4M04S-BLE-4-2-5-0-long-distance-100m-2-4GHz-SMD-ARM-Core/2077046_32820692238.html?spm=2114.12010615.0.0.TZClHR[Edit: Also, on Aliexpress, Ebyte gives a coupon for $5 off if you order >$45]
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@NeverDie yes noticed their shop only 2 days ago and feeling frustrated now
For shipment delay I wouldn't be surprised if they shipped the same way with free option and it would just be a different way to state the delay on the 2 websites...
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@Nca78
We'll soon know. I ordered Ebyte products from both Ebay and Aliexpress, and I'll take note of when each order arrives.
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
So, what's the smallest nRF52 module that also includes a 32Khz crystal? I think I might want to standardize as much as possible on a single module rather than juggle a bunch of different ones.
I have found the Raytec Modules. http://www.raytac.com/products.php?id=1
The smallest one is the MDBT42V 8,4x6,4x1,5mm with PCB antenna and 80m range in open space.This module https://www.mtmtech.com.tw/M905.html is 6.5 ✕ 6.5 x 1.1 mm
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@d00616 said in Minimalist SAMD21 TQFP32 Pro Mini:
@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
So, what's the smallest nRF52 module that also includes a 32Khz crystal? I think I might want to standardize as much as possible on a single module rather than juggle a bunch of different ones.
I have found the Raytec Modules. http://www.raytac.com/products.php?id=1
The smallest one is the MDBT42V 8,4x6,4x1,5mm with PCB antenna and 80m range in open space.This module https://www.mtmtech.com.tw/M905.html is 6.5 ✕ 6.5 x 1.1 mm
M905 is impressive, but with connectors at the bottom it's impossible to hand solder...
Raytac module is what scalz used for the prototype of his "Aeos" board, pretty small but he didn't look so happy with the range.
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Guys, when you start using these 832 chips are you going to be programming via Bluetooth or just using the radios in some other way?
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@Terrence said in Minimalist SAMD21 TQFP32 Pro Mini:
Guys, when you start using these 832 chips are you going to be programming via Bluetooth or just using the radios in some other way?
I'd like to see the work extended to include Bluetooth. Nearly everything has bluetooth these days, so leveraging that would seem to make a lot of sense. I just don't know where to start.
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
Nearly everything has bluetooth these days, so leveraging that would seem to make a lot of sense. I just don't know where to start
I agree.
I have done a little bit of BT programming. It seems pretty complex, but I am sure that will change once we immerse our attention in it.
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I'd like to see an extremely basic script that simply has two bluetooth nodes talking back and forth to one another (maybe just increment a counter on each turn and send just that). If we could get that simple activity working, then I suspect the rest could follow more easily.
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Or there's this from Arduino: http://www.ebay.com/itm/Arduino-Primo-Core-MCU-nRF52832-ARM-32-bit-64MHz-ESP8266-WiFi-BT-BLE-A0000138-/122599125462?hash=item1c8b7a31d6:g:LQkAAOSwmFNZaQRe
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@NeverDie Here is Kris's great looking board over on Tindie for $40
https://www.tindie.com/products/onehorse/nrf52832-development-board/And his great GitHub repo showing how to program it.
https://github.com/kriswiner/nRF52832DevBoardAnd Sandeep Mistry's Arduino core lib
https://github.com/sandeepmistry/arduino-nRF5I am going to try and contact Kris and see if he will come over and join us.
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All the bluetooth sketches that I've heard of so far boil down to a bluetooth node communicating with your smartphone. That's great, and I'm glad for that, but it seems more like a wireless GUI than the internet of things.
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@Nca78 said in Minimalist SAMD21 TQFP32 Pro Mini:
@d00616 said in Minimalist SAMD21 TQFP32 Pro Mini:
@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
So, what's the smallest nRF52 module that also includes a 32Khz crystal? I think I might want to standardize as much as possible on a single module rather than juggle a bunch of different ones.
I have found the Raytec Modules. http://www.raytac.com/products.php?id=1
The smallest one is the MDBT42V 8,4x6,4x1,5mm with PCB antenna and 80m range in open space.This module https://www.mtmtech.com.tw/M905.html is 6.5 ✕ 6.5 x 1.1 mm
M905 is impressive, but with connectors at the bottom it's impossible to hand solder...
Raytac module is what scalz used for the prototype of his "Aeos" board, pretty small but he didn't look so happy with the range.What's great is that both nodes are built around the Nordic nRF52, so the software still works.
With such a small antenna on the small Raytac node, at least some impairment is probably unavoidable. @Scalz How many dBm are lost because of it?
Regarding the M905, if there were some company that could simply solder the M905 to a PCB of the same size with castellated pins along the edges.... we'd be set, because we could then hand solder to that. I have no idea what that would cost or what the minimum batch size would have to be for it to make economic sense. Maybe someone here knows about such things? Perhaps it's something that Itead or one of the mysensors manufacturing partners could comment on or do?
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@NeverDie Here is a repo from Seeed showing master and slave comms.
https://github.com/Seeed-Studio/Bluetooth_Shield_Demo_Code/tree/master/examples
Oh and it looks like Kris posted his dev board on ohw.io
https://forum.mysensors.org/topic/7160/nrf52-development-board
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@d00616 said in Minimalist SAMD21 TQFP32 Pro Mini:
I have a lot of RedBear BLE Nano 2 (18x21mm) modules. It's complete including 32Khz crystal and a 3-13V voltage converter. With 2.54mm pins it's easy to solder.
Sounds like a good way to get started, as well as build quick prototypes.
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@d00616 said in Minimalist SAMD21 TQFP32 Pro Mini:
I think the best option for beginners is to use an CMSIS-DAP/DAPLink adapter. Firmware and drivers are open source and there is an integrated serial port.
Is this how to wire up a CMSIS-DAP to the nRF52832?
i.e. it's the same as a j-tag wiring setup, except that you add the serial Rx and Tx lines?
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Well, this is bordering on ridiculous. I received the CMSIS-DAP from Adafruit, but there is no windows driver for it. Furthermore, the company that made it (armstart) has apparently gone out of business.
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
Is this how to wire up a CMSIS-DAP to the nRF52832?
You have to wire SWCLK and SWDIO. In a note of RedBear BLE Nano 2 i have seen, you require DAPLink >1.5 for nRF52832 support. Rx+Tx is not required for programming.
@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
Well, this is bordering on ridiculous. I received the CMSIS-DAP from Adafruit, but there is no windows driver for it. Furthermore, the company that made it (armstart) has apparently gone out of business.
You should see an storage device and an serial device. The serial device windows driver is available at https://developer.mbed.org/handbook/Windows-serial-configuration
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@d00616 said in Minimalist SAMD21 TQFP32 Pro Mini:
The serial device windows driver is available at https://developer.mbed.org/handbook/Windows-serial-configuration
Unfortunately, when I try installing that, it says, "The driver could not be installed. No mbed Micronctrollers were found."
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
Well, this is bordering on ridiculous. I received the CMSIS-DAP from Adafruit, but there is no windows driver for it. Furthermore, the company that made it (armstart) has apparently gone out of business.
That sucks a lot. Try searching for the hardware id you see in windows, maybe you can find some other drivers from other vendors.
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Has anyone noticed that a bunch of cheap Chinese "smart bands" use a nrf51822 ?
This opens some new possibilities if used as MySensors actuator !
https://www.youtube.com/watch?v=SBHyQ1OSM-4
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@Nca78 said in Minimalist SAMD21 TQFP32 Pro Mini:
Has anyone noticed that a bunch of cheap Chinese "smart bands" use a nrf51822 ?
Yes. There are people working with it. Please read the discussion at github. There are watches with non nordic chips.
https://github.com/sandeepmistry/arduino-nRF5/issues/165
There are a lot of other hardware like the Noke Lock
Or the iStubb 2 with integrated stop up converter (maybe inductor + software) which works with 0.9V.
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@d00616
Fortunately, I just received the J-link segger from aliexpress. When I plug it in, Windows seems to immediately recognize it. However, the problem is that the Arduino IDE doesn't seem to recognize it: it doesn't show up in the IDE port list under the tools menu.I've tried installing each of the Zadig usb drivers, in turn, with no difference.
I tried installing the mbed usb windows driver, but it fails with the same error message as before.
I also tried downloading the segger software pack and installing it. Still fails.
Frustrating!
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
I've tried installing each of the Zadig usb drivers, in turn, with no difference.
You have to remove the J-Link software completely. With my old j-link I had to install the J-Link software for Firmwareupdate. After that I removed the J-Link Software and all drivers via "device manager" (module plugged in) and reinstalled the correct driver with zadig (plugin module after starting zadig).
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@d00616
OK, I'll try that. Which of those 4 Zadig usb drivers should I pick?
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
OK, I'll try that. Which of those 4 Zadig usb drivers should I pick?
Open the windows device manager and pull/plug the device and remove all depending drivers with option to uninstall the drivers.
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@d00616
Right. But after that, which of the four do I re-install from Zadig? Or, am I misunderstanding?
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@Nca78 said in Minimalist SAMD21 TQFP32 Pro Mini:
Has anyone noticed that a bunch of cheap Chinese "smart bands" use a nrf51822 ?
This opens some new possibilities if used as MySensors actuator !
https://www.youtube.com/watch?v=SBHyQ1OSM-4
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this one with nodic 52832
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next nice board with NRF 52832
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@NeverDie said in Minimalist SAMD21 TQFP32 Pro Mini:
Right. But after that, which of the four do I re-install from Zadig? Or, am I misunderstanding?
The CDC and BULK interface. All other are other Hardware.
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FWIW, I ran across another example of where someone is using the DK to program an external nRF5 board:
(https://github.com/electronut/ElectronutLabs-bluey/blob/master/nRF52-DK-prog.md)
Unfortunately, that photo is also roughly the extent of their documentation, though they do spell out the pin mapping and tell which Linux commands to use.
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I tried wiring it up as shown in the photos to the Adafruit nRF52832 and doing a programming through the DK and the Arduino IDE, but as you would expect it just programmed the nRF52832 that's on the DK and not the Adafruit. So, either there's a jumper that needs to be set, or different software is required to program an off-board nRF52832.
