STM32?

[ooznerol]

@freynder

Instead facing through the code , I think about compile with a debugger (like IAR ou Keil for example). Do you think it is possible?

[freynder]

@ooznerol No experience with those I'm afraid. From my notes I see I did experiment with using GDB in combination with a Black Magic Probe (BMP) to debug the blue pill. You can probably convert your SWD adapter to a BMP device:
https://madnessinthedarkness.transsys.com/blog:2017:0122_black_magic_probe_bmp_on_st-link_v2_clones
https://github.com/blacksphere/blackmagic/wiki

[ooznerol]

Hi all, it's me again.

So finally Gateway is working fine. The problem was that the driver (specially on windows) seems little bit unstable (I must open the serial just after strating and close it after I finish my test).

So now I am playing with consumption.

I take the low power implementation from freynder and reach 860uA. This implemenation used STOP mode. If I change this to STANDBY mode I reach 4.1uA. But in this case when I wake up, the CPU react as it has been reseted and relaunch all mysensors init and presenation etc etc . So the trick will be to check the wake up reason, and in case of wake up from standby not relaunch mysensors init. Do you think it is possible inside mysensors architecture?

Thanks

[freynder]

@ooznerol I suppose you intend to run on battery? I desoldered the power led and voltage regulator on mine to reach 100uA (if readings were correct) using STOP mode. It ran on 2 AAA batteries for several months.

I'm unsure about using the STANDBY mode. Since RAM and registers contents are lost and pins are high impedance, full reinitialization seems necessary. Do you want to prevent the presentation communication specifically from happening? You can control that from your sketch directly in the presentation function I suppose...

[ooznerol]

@freynder Yes I have of course remove unless hardware. ( i can't reach 3.3uA with it). In STOP mode, we are suppose to reach around 20-30uA (from datasheet). I will try yo investigate

I can of course handle reset cause into presentation, but I don't know if other init are done inside mysensors architecture.
For STANDBY mode , we can save usefull data for mysensors into backup register. I had done something similar in the past but not in stm32duino environnement.

[Nca78]

@ooznerol said in STM32?:

I can of course handle reset cause into presentation, but I don't know if other init are done inside mysensors architecture.
For STANDBY mode , we can save usefull data for mysensors into backup register. I had done something similar in the past but not in stm32duino environnement.

Yes, before the presentation MySensors will initialize radio, check radio link/parent etc
There's no easy way to avoid it at the moment, but I think it should be a feature request, as we have the same situation with chips like NRF51/NRF52 which are also ARM based, if you want really low power consumption you need to go through a reset and MySensors initialization phase makes the wake up slow and power hungry.

[nagelc]

Just got a blue-pill, RFM69 node working. It was a bit of a learning curve moving from Atmega.

• Cheap J-Link: Never got it working. Cheap ST-Link: Worked
• Arduino (and VisualMicro) uploaded blink sketch with ST-Link: no problems
• Uploaded the USB bootloader using the ST-Link: no problems
• Took a while to figure out I didn't have the dfu driver loaded (Windows 10), but after that no problems using the usb
• MySensors security personalizer: no problems.
• Mock MySensors node: no problems. Talked to my gateway. Uses RFM69 encryption.

Seems like this is the Nano of the future, but without needing to level shift for 3.3V. I'm looking forward to making some real blue pill nodes and gateways.

[Brasletti]

Does anybody get the Serial Gateway with RS485 working? I can't get debug messages on serial console.

[NeverDie]

@alowhum You may want to consider the nRF5 series instead.

[Brasletti]

OK it is working with Hardware Serial. But still no debug message on startup. Maybe it's because the switching of the usb mode.

Is it possible to wait 2sec before starting up the gateway on stm32 boards?

[alowhum]

@neverdie Thanks! I ordered one, they look very interesting.

[freynder]

@freynder said in STM32?:

@freynder said in STM32?:

stm32 sensor is unable to connect to gateway:

After further testing, this seems to work now. I'm not exactly sure why unfortunately. I'm now using the new RFM69 library. I noticed that communication seems to fail after uploading the sketch over stlink, even when clicking the reset button. When disconnecting/reconnecting the usb power all works well. Maybe that was the issue previously as well.

Just following up on this as I finally found out why this is happening. I was using encryption and using serial upload (using stm32flash), the simulated eeprom would get overwritten by the flash erase. Not sure if this happens for dfu or stlink as well. Uploading using the black magic probe (which uses dbg) does not have this problem. I hope this may help someone struggling with the same issue.

Edit: not sure about dfu or stlink.

[nagelc]

Has anyone been able to do OTA programming with the STM32 yet?

[Dab0G]

@nagelc Yes I did. My bootloader - https://github.com/mysensors-rus/STM32_Mysensors_bootloader. My modified MySensors library - https://github.com/mysensors-rus/MySensors. Short description in Russian - https://mysensors-rus.github.io/STM32-OTA-MySensors

[nagelc]

@dab0g Wow! I did not expect anyone to answer. This is really great. I have a remote control lamp and a thermostat that use the STM32 and it would great to be able to program them OTA. I'll check it out.

[alowhum]

@nagelc said in STM32?:

@dab0g Wow! I did not expect anyone to answer. This is really great. I have a remote control lamp and a thermostat that use the STM32 and it would great to be able to program them OTA. I'll check it out.

If you do, be sure to create an English write-up for the rest of us!

[Dab0G]

My mini board.