@tiana I have not used it, but it is possible to create different revisions. See https://www.openhardware.io/view/4/EasyNewbie-PCB-for-MySensors#tabs-revisions as an example.

@kimot in theory you might be right, but in practice... it just works. The propability of collisions is extremely low and this is, as far as I know, the only problem you can worry about. After all, it was not my idea to use MySensors with RS485: https://www.mysensors.org/build/rs485

@aze No Problem all the time nice to hear idea from people

@anticimex You are too fast Now the CERN files are uploaded!!

Hello, interesting project. I am looking for some relays 10A, but i do not find under 5VDC. Where did you buy them ?

id also second the use of 18650s

@emdzej - I'm not sure but it's designed for 3.3v. you have to check the rfm radio for Max input voltage on VCC and io. I think it's 3.3v so you might have to regulate down your lipo battery to this.

@schif Hello, Thanx for you comment. Yes you can use it but use a ceramic capacitor

hello! can you advice how flash this fw in arduino ide with avr isp? not work with atmega without crystal yet

Hi @koresh - I had a little accident on the AC side :-). I was wondering what values the 2 resistors (TH and SMD) and diode are ? Thanks!

@koresh said in Button size radionode with sensors swarm extension: @christoph-blank Hi, thanks for using this board. In the first version of this board the divider is conected after LDO, so you can't measure voltage above 3.3V. In the second version the divider is connected to the battery directly. You use 3.2v battery so it is not problem for you. But LiFePo4 battery has very flat discharge curve so it can be hard to read this level with reasonable accuracy. I will try to find LiFePo4 battery and add some piece of code soon. Yet you can play with followed code // Get the battery Voltage int sensorValue = analogRead(BATTERY_SENSE_PIN); // 1M, 470K divider across battery and using internal ADC ref of 1.1V1 // ((1e6+470e3)/470e3)*1.1 = Vmax = 3.44 Volts /* The MySensors Lib uses internal ADC ref of 1.1V which means analogRead of the pin connected to 470kOhms Battery Devider reaches * 1023 when voltage on the divider is around 3.44 Volts. 2.5 volts is equal to 750. 2 volts is equal to 600. * RFM 69 CW works stable up to 2 volts. Assume 2.5 V is 0% and 1023 is 100% battery charge * RFM 69 HCW works stable up to 2.5 volts (sometimes it can work up to 2.0V). Assume 2.5 V is 0% and 1023 is 100% battery charge * 3.3V ~ 1023 * 3.0V ~ 900 * 2.5V ~ 750 * 2.0V ~ 600 */ #ifdef MY_IS_RFM69HW int batteryPcnt = (sensorValue - 750) / 1.5; #else int batteryPcnt = (sensorValue - 600) / 3; #endif Thank you very much, what are the other differences between V1 and V2? I believe I have V1 but I'm not sure. The above code is what I currently use, and I removed the sensor part of the module. However, it shows 100% until the end (until it's not sending anymore). Looking forward to your tests! Christoph

@gohan Yes, you are right, this is done by cnc router.

@GertSanders ok, strange. standard pin headers fit for me only into FTDI and ICSP pin holes. Into the other two 8 pin rows it does not fit.

@yoonie said: For the pro mini version, should i create another Openhardware project, or should i put it here, in the already existing project? Might be better to create a new project as they uses a different set of design files.

this kind of optic fiber is probably only plastic so for a full DIY , you can use also fishing wire with a big power led or an old chistmass tree optic fiber lighted.....

@zeblong, you can generate these from the board files, however i'm leaving this one for @Ivan-Z to discuss with you as this is his device and he knows all details regarding this.