@kisse66 said in Debug to a sd-card module?:

OpenLog

Nice find! Thanks!

@Tommas do you have pullups (around 10k) at sda & scl lines?

@hugch Not yet really... The batteries had to last for 1 day at least during each day of the Faire and that worked out fine
I had to swap the wind sensor battery after one day, but it didn't sleep and had to send a message every 2 seconds.
I'll probably deploy some nodes (e.g. soil moisture and BMP280) in my house anywhere soon, to get a feeling for battery lifetime.

@maciej initialization of the radio failed. Quadruple check your wiring, assure the radio is powered from a stable 3v3 supply. If all looks fine test with another module.

@Sushukka I developed a LED pattern blinking library that does all the blinking/fading for mono or RGB leds for you.
You just have to call an update function at regular intervals; that's it.
Maybe it can be of any use to you: https://github.com/Yveaux/LedPattern

@dbemowsk it was a one time batch for the Faire only. Sorry.

@ahmedadelhosni It's been in there for ages: https://github.com/mysensors/MySensors/blob/4783cac945df33a84ef20572c87557087f453ae8/libraries/MySensors/MyConfig.h#L11
(this is from 1.4.1, over 3 years ago. Can't go back any further on GitHub )

@LeKrist it could very well be that the adapter boards are the culprit. They normally use an ams1117-3v3 to generate the 3v3 supply, but I've seen Chinese copies of this chip that could barely generate 100mA.
The best results I always obtain with 2xAA battery powered sensors. You could always give this a try as it is a quick test (assuming you're also using a 3v3 arduino; eg pro mini) and additional capacitors are not required.
Just make sure you start with fresh batteries so the supply will be around 3v and power both the radio and arduino directly from the batteries - no step up/down converter needed.

@LeKrist don't test 'worst-case' signal path by standing in between two radio modules. Your body is 70% water, which forms a perfect block for 2.4GHz signals.