@mbj No problem! Actually, I've encountered another issue. But I found that that may depend on the bootloader. The first time I "solved" the problem was another board with a generic 328p breadboard bootloader (I apparently didn't pay attention when burning the BL for the various boards) Last week I had a problem with a board with the Gert Sanders 328p bootloader when I couldn't enable the MY_DEBUG. When I changed the board type it compiled, but wouldn't upload because of the differences in baud rate. I will probably have to reflash al boards withe the same bootloader but that means de-solder all radios ... 😣 When I have time again I will investigate further.

@mbj said in Rain sensor: @jumping Unfortunately I had no time to look at anything last week and i will not be able to do it the next cople of weeks because of travelling but I promise it will come. I assume that you also have seen the code for a rain sensor at the Mysensors forum but if not take a look there in the meantime. I know this is a different solution but might be of interest anyhow. No problem :-) thanks

It was not so hard finding one. I got it from the Pi Hut because now and then they get a shipment and via their newsletter the word is spread. Actually, they seem to have it in stock right now. Just pick the "Just the Pi Zero" option to avoid all their extras :-) Here is the link https://thepihut.com/products/raspberry-pi-zero?variant=14062715972

@DirkB19 Think you will get another advantage by changing as well - must be a lot easier to monitor the MQTT messages when topic clearly shows the difference.

@hek That was very visible, please excuse my ignorance. Even though I have looked at this page I managed to leave the change unnoticed.

@mbj Thx, I wont draw any scientific conclusions from your figures either. I was just curious. As you said there're always discussion about accuracy and working ranges etc.

Now the RPi based on a new install of Raspbian Jessie, OpenHab 1.8.0 and Mosquitto is up and running and the ESP8266 MQTT client does connect without any problems. I have not changed anything in the code but Mosquitto is now based on the RPi repository for Jessie and not the mosquito_wheezy one. That seems to have fixed it so those versions are likely different but I have not put any time into checking this.

@NickBuilder I now have looked at the code and (of course) you are right, the interrupt is used for the pulse count which I think is the best way of programming this function. My sensor is based on an old version of this code but modified for use with Openhab (which does not give any start value back, this function has to be own programmed). Another modification is that same unit monitors a number of temperature sensors. The "thing" has been in operation since my first post above and works well but I guess I should make an effort to modernize the code. Maybe a task for the long and dull autumn/winter days here.

@ericvdb Yes, I know about the 5V. But the adapter brings it down to 3.3V for the radio, that is the reason for using it and the adapter is equipped with the AMS 1117 3.3V chip. Seems to work OK but I really do not have any hard facts to prove it. One thing I may test is to wire the 5V also directly to this adapter instead of taking it out from the Arduino 5V pin. This is to find out if this Arduino Nano clone might have too small capacity for feeding the radio at certain occasions.