Hardware

@TimO Great, thank You!

If I remember well there should be some modbus libraries on github

I think it's not worth spending time on a half working solution when there is a working one that's very cheap

@gohan Thanks for info.

@dbemowsk said in Problems with an SI7021 temp/humidity sensor: @Yveaux So I tried that library and it worked. Thanks for the help. Now I just need to print an enclosure for the thing. Great!

@mfalkvidd Thank you, this is worth checking! regards,

@Aron-Sjöberg Great switches, I thought these went out of production in the 60'ties :) As you are going for a battery powered solution a good starting sketch would be the motion detector. Just replace the motion sensor with the switch and you are almost done. The switch will probably need some debouncing. Add a ``sleep(100)``` to avoid retriggering. If you want to use a momentary switch you need a variable to save the last state.

Not really, I haven't used them yet. Remember that you can use the M0 as sensor node.

@tomasandersson Have a look at this thread. I think it contains the answer on your fixed ID (children) question. https://forum.mysensors.org/topic/4834/unique-id-value-ds18b20-temperature-sensors I personally used the sample programs as provided with the MySensors lib with succes the get the DS18B20 onewire working. A resistor 4k7 from +5VDC to the middle pin of the DS18B20 connected to D3 from the arduino and both outer pins of the DS18B20 connected to GND works perfect for me. BR, Boozz

A supercapacitor with a small solar cell would be interesting - does anyone have experience (3.3/5v size of capacitor, solar cell, etc)?

Wow, i did not do this to my digital weight scale. You did a great job here

I found the problem: https://github.com/LowPowerLab/SPIFlash/issues/16 The sketch I used to verify the SPI Flash was missing a SPI.begin() in setup().

@Takero Good idea, I will implement it ! Thanks !

Would there be much call for the current sensing capabilities on this board? Do people actually care for per module current sensing or would you just rather monitor your main electric board for overall usage?

I don't know what kind of html fritzing produces. But you can normally copy html tables into excel/openoffice and export a csv/xls from there.

can you post some code? interrupts work fine with my sonoff: attachInterrupt(PIN_PIR_SENSOR, ISR_PIRPinHasChanged, CHANGE); [...] void ISR_PIRPinHasChanged(){ int currentPinStatus = digitalRead(PIN_PIR_SENSOR); if(currentPinStatus == LOW){ Serial.println("ISR fired, pin LOW"); } else{ Serial.println("ISR fired, pin HIGH"); ToggleRelay(); } } ISR fired, pin LOW ISR fired, pin HIGH toggling relay to OFF switching off sending status to controller ISR fired, pin LOW ISR fired, pin HIGH toggling relay to ON switching on sending status to controller ISR fired, pin LOW ISR fired, pin HIGH toggling relay to OFF switching off

@Igor-Antolić if you want to help the original author of the question, posting an answer on the linked stackexchange thread will probably be more efficient. The original author is not likely to look in a different forum, almost 5 years later.