Topics created by sola

I have built 2 nodes with E01-ML01S (the cheapest module) and I have pretty good experience with them so far. I didn't have to use any capacitors to improve range, they are directly connected to some medium-quality Arduino Nano GND/3.3V. One of them is a lighting controller node, ~3 meters from the PA/LNA gateway (+ a 30cm wall) on the same level as the gateway. The other one is a repeter node and is ~10 meters from the gateway (+ a 20cm wall, same level as the gateway). In this case, radio orientation was important to get a good signal. One of the test modules could communicate with the gateway through 2 walls and a the ceiling (steel-bar reinforced). All-in-all, I am satisfied with the signal stability of these modules. It is a bit finicky to solder the wires to the module because the pads are very small. I always put some solder on the pads first and reheat when I attach the wires.

@user2684 Thanks for your answer. I will check out other boards and experiment with disabling debug.

@sola Thanks for your prompt feedback.

@rozpruwacz Actually, I considered that as the fallback solution but I do not want to increase complexity if there is a robust, simple solution.

@Carywin thanks. I've corrected my calculation.

@sola yes, you are correct that the calculation is form2xAA. See the comment inside loop() on the example at https://www.mysensors.org/build/battery for the required calculation, and this part for the voltage divider: The ADC is set to use the internal reference value of 1.1V - so Vmax at ADCmax = 1.1*(16+4703)/4703 = 3.44V You'll need to change the resistors in the voltage divider to handle voltages as high as 8V.

Thanks for the link. Still not cheap (1.44" for $12) but at least not outrageous like the Adafruit.

Great. I added a comment to the GitHub issue to signify its importance.

It works, many thanks. I used a 4K7 resistor as pull-up and it seems to be enough.