nRF5 action!
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I was able to reduce the active listen period to about 100us:
Now listening every 100ms yields a 10F supercap voltage measured decline of just 9mv per hour. i.e. a decline of 0.108v by the end of 12 hours.@NeverDie said in nRF5 Bluetooth action!:
Now listening every 100ms yields a 10F supercap voltage measured decline of just 9mv per hour. i.e. a decline of 0.108v by the end of 12 hours.
Great job. If I'm not wrong the method allows nearly 1 year of listening time with a CR2032.
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Where is it possible to find a reference schematic for using the NTF52832 E73-2G4M04S module with NFC?
not much is being given in the datasheet not even where the NFC pins go.
@Mike_Lemo your best bet is to "convert" the module to Arduino Primo and use the NFC libraries developed for it.
d00616 gave you the link to the arduino org github. Pls. note that Primo core generates a merged softdevice+sketch hex so you should locate it in the Temp folder and upload. -
Here's a very simple OPEN/CLOSE remote control I was able to quickly throw together using my small prototyping board:
It required only two buttons, a diode, a resistor, and (obviously) some wire. When not in use, everything is powered 100% OFF to save the most energy possible. So, pushing either button powers it ON, at which point it rapidly determines which button was pushed and then sends the corresponding packet to the receiver. From the standpoint of human perception, it all appears to happen instantly. -
This is how the next version of the protoboard will look:
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Interestingly, it looks as though Arduino is suggesting/recommending users to use the regular Arduino Primo to program the Arduino Primo Core (i.e. the wearable).
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Interestingly, it looks as though Arduino is suggesting/recommending users to use the regular Arduino Primo to program the Arduino Primo Core (i.e. the wearable).
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@Toyman said in nRF5 Bluetooth action!:
@NeverDie is this SWD?
I don't have either the Primo or the Primo Core, so I can't say for sure. However, I presume so.
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Did anyone managed to get two NRF52832 to connect to each other with the arduino IDE and communicate?
Also why does I2C initializes only after an SWD programmed gets connected?
Wierd phenomenon when I use an I2C oled display with that chip and program it with an st link V2 after it displays alright when it's booted if the SWD programmer is connected but as soon as you disconnect it everything else works but the I2C display...
@Mike_Lemo
This sounds more like an EMC issue.
The connected ST Link filters some disturbance at the i2c lines, and when it's not connected, the disturbance corrupts the signals.
Try connecting capacitors from the i2c lines to ground. I'd start with 100pF each.
May also be a power supply issue. Did you connect the st-link's 3.3V line to the board? -
Here's the small budget nRF51 soldered to the breakout board that I had linked earlier above:
I have the RTC running off the low frequency internal RC, because I don't see a crystal oscillator on the module. I have it blinking an LED now and sending text to the serial port, which I'm able to read on the serial console.
At least so far, all is good. :)
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Here's a very simple OPEN/CLOSE remote control I was able to quickly throw together using my small prototyping board:
It required only two buttons, a diode, a resistor, and (obviously) some wire. When not in use, everything is powered 100% OFF to save the most energy possible. So, pushing either button powers it ON, at which point it rapidly determines which button was pushed and then sends the corresponding packet to the receiver. From the standpoint of human perception, it all appears to happen instantly.@NeverDie said in nRF5 Bluetooth action!:
Here's a very simple OPEN/CLOSE remote control I was able to quickly throw together using my small prototyping board:
It required only two buttons, a diode, a resistor, and (obviously) some wire. When not in use, everything is powered 100% OFF to save the most energy possible. So, pushing either button powers it ON, at which point it rapidly determines which button was pushed and then sends the corresponding packet to the receiver. From the standpoint of human perception, it all appears to happen instantly.Hello @NeverDie, could you please share the code for this ?
I'd like to adapt and test it on a reprogrammed nrf51822 beacon that I just received. -
@NeverDie said in nRF5 Bluetooth action!:
Here's a very simple OPEN/CLOSE remote control I was able to quickly throw together using my small prototyping board:
It required only two buttons, a diode, a resistor, and (obviously) some wire. When not in use, everything is powered 100% OFF to save the most energy possible. So, pushing either button powers it ON, at which point it rapidly determines which button was pushed and then sends the corresponding packet to the receiver. From the standpoint of human perception, it all appears to happen instantly.Hello @NeverDie, could you please share the code for this ?
I'd like to adapt and test it on a reprogrammed nrf51822 beacon that I just received. -
@Nca78
I can, but it wouldn't be proper "mysensors" code, because mysensors code has a 5-10 second power-up delay. So, for that reason, it's using radiohead instead. Do you still want it anyway?@NeverDie said in nRF5 Bluetooth action!:
@Nca78
I can, but it wouldn't be proper "mysensors" code, because mysensors code has a 5-10 second power-up delay. So, for that reason, it's using radiohead instead. Do you still want it anyway?Ah I see, probably still interesting to see, please share anyway :)
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I am trying to reprogram a commercial nrf51 module. Under "commerical" I mean "not from aliexpress", but installed in "smart" bluetooth socket.
I can connect to it with Black Magic Probe just fine, but after mass_erase, BMP reports 0xfffffffe instead of usual 0xffffffff, meaning something is lef behind. That prohibits reflashing of softdevice BUT I can load "plain" skethes that do not require softdevice
I ASSUME the module has some kind of write protection and/or UICR registers set that are not erased with BMP mass+erase command.
I've tried to load d0016 uuicr clearing sketch, It loads fine, but I've still got 0xfffffffe after masserase.
So what's the proper way to really completely erase the module?
I have nrf52 dk that I tried to use as a programmer but it didn't worked. -
@NeverDie said in nRF5 Bluetooth action!:
@Nca78
I can, but it wouldn't be proper "mysensors" code, because mysensors code has a 5-10 second power-up delay. So, for that reason, it's using radiohead instead. Do you still want it anyway?Ah I see, probably still interesting to see, please share anyway :)
@Nca78 said in nRF5 Bluetooth action!:
@NeverDie said in nRF5 Bluetooth action!:
@Nca78
I can, but it wouldn't be proper "mysensors" code, because mysensors code has a 5-10 second power-up delay. So, for that reason, it's using radiohead instead. Do you still want it anyway?Ah I see, probably still interesting to see, please share anyway :)
Here it is, warts and all:
0_1506603795796_remote_control_v031.zip
It works, but it's just hastily improvised throw-away code, so I made no attempt to polish it. i.e. For anyone reading this: It is very definitely not demo code. -
I was thinking that maybe the Ebyte module is stuck in some kind of reset mode, but I just now checked pin P0.21 (the reset pin), and it measures high at 3.3v. This is the same as for the Sparkfun board, which I have no trouble programming. Reset is active low.
@NeverDie This may be old news but I will throw it out anyway. The Reset pin on the nRF52 series is both a GPIO and RESET line (one or the other) . This is not a dedicated Reset however and the application must define that pin as RESET. This is the only pin that can be defined as reset. The Datasheet describes this as well.
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I am trying to reprogram a commercial nrf51 module. Under "commerical" I mean "not from aliexpress", but installed in "smart" bluetooth socket.
I can connect to it with Black Magic Probe just fine, but after mass_erase, BMP reports 0xfffffffe instead of usual 0xffffffff, meaning something is lef behind. That prohibits reflashing of softdevice BUT I can load "plain" skethes that do not require softdevice
I ASSUME the module has some kind of write protection and/or UICR registers set that are not erased with BMP mass+erase command.
I've tried to load d0016 uuicr clearing sketch, It loads fine, but I've still got 0xfffffffe after masserase.
So what's the proper way to really completely erase the module?
I have nrf52 dk that I tried to use as a programmer but it didn't worked.@Toyman What is the make and model of the module. You can use the nRF52-DK to erase the device. P20 is a ease access to the programming pins on that board. You need to power up the module, run the VDD from the module back to the dev kit , P20, Pin2. Hook up the SWDIO lines to Pin3 and the SWDCLK to Pin4. and Ground, Pin8. As reset is not hardwired you don't have to hook that up unless you want to (Pin7. .  You can use nRFJPROG to exersise the J-Link (Segger). This is found in the downloadable tools on the Nordic site. BTW - I have no problem using J-Link Commander version 6.20c with the nRF52-DK with the nRF52832 mounted. I hope this helped.
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@NeverDie This may be old news but I will throw it out anyway. The Reset pin on the nRF52 series is both a GPIO and RESET line (one or the other) . This is not a dedicated Reset however and the application must define that pin as RESET. This is the only pin that can be defined as reset. The Datasheet describes this as well.
@Jokgi said in nRF5 Bluetooth action!:
@NeverDie This may be old news but I will throw it out anyway. The Reset pin on the nRF52 series is both a GPIO and RESET line (one or the other) . This is not a dedicated Reset however and the application must define that pin as RESET. This is the only pin that can be defined as reset. The Datasheet describes this as well.
Yes, and thanks to @d00616's work, RESET can also be enabled/disabled from the Tools menu of the arduino IDE if using myNRF5Board as the board definition.
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I just now compared the transmission range and packet loss of the cheap nRF51822 to the Ebyte nRF52832. I expected that the Ebyte, with its bigger and fancier antenna, to mop the floor with the nRF51822, but I was surprised to find that they actually seem fairly comparable (at least in my informal, off-the-cuff testing). So, if you have a sensor that's mostly transmission oriented, like, say, a TH sensor, the smaller and cheaper nRF51822 is maybe worth considering.
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I just now compared the transmission range and packet loss of the cheap nRF51822 to the Ebyte nRF52832. I expected that the Ebyte, with its bigger and fancier antenna, to mop the floor with the nRF51822, but I was surprised to find that they actually seem fairly comparable (at least in my informal, off-the-cuff testing). So, if you have a sensor that's mostly transmission oriented, like, say, a TH sensor, the smaller and cheaper nRF51822 is maybe worth considering.
@NeverDie said in nRF5 Bluetooth action!:
the smaller and cheaper nRF51822 is maybe worth considering.
That is interesting. What sort of range where you getting?
Do you have the 840 dev kit? If so, can you measure range on that guy? Should be 10x I would think.
