#6 ESP8266rf and Bigger Currents

[@dennisjansen5205]

Thank you for this video (and the instructions). I own a Dostmann 868MHz thermometer and I have always wanted to intercept the transmissions. I may give this a try.

[@hannupulkkinen9999]

I always wanted to use RFM69 (and RFM12b) with ESP8266. It seems to be possible. Must try. Thank you for your instructions.

[@miikakurkela5606]

Than you for your comment! I have written here docs.google.com/document/d/1hcMhY_y2T6fsfzTxcGdZ6iqhlnEODvlAjnqxyAF-qWs/edit#heading=h.3wnyekqsa03q how I ended up wit this hardware. I started with two Adafruit radios and step by step modified the receiver towards the receiver that we see in the video.

[@dennisjansen5205]

I am struggling to get my RFM69 to work. I installed the RFM69 library but the sample code keeps ginging me the error avr/wdt.h not found. This is caused by the fact that the code was written for an arduino an I am using it on a esp8266. How did you solve this issue?

[@miikakurkela5606]

I do know that feeling! The first hardware that worked for me was two Adafruit Feather M0 radios with RFM69.h library's example prgrams. After that everyting was quite straightforward. I just modifiedt that pair of example programs towards my own needs. See: docs.google.com/document/d/1hcMhY_y2T6fsfzTxcGdZ6iqhlnEODvlAjnqxyAF-qWs/edit#heading=h.3wnyekqsa03q

[@dennisjansen5205]

I realised that in this KZbin movie you wrote the code without using a library. You are doing the communication with the rfm69 yourself. So I shamelessly copied your code :). Unfortunately, it doesn't work for me. I am able to set a register to a value and read it back but there are no transmissions coming in. Maybe that is due to the fact that I am using a RFM69CW instead of the RFM69HCW that you used. I also have a different Dostmann sensor. I am using the 30.3180.IT. So maybe I have to get the same sensor that you have.

[@miikakurkela5606]

Very good! You already can read and write the registers. But I guess that your wireless Dostmann temperature sensor uses some other protocol than mine: On the page tfa-dostmann.de/index.php?id=117 they say that your Dostmann 30.3180.IT can be used with only the Dostmann 30.3039.IT weather station. But on the same page they say that my Dostmann 30.3143.IT can be used with 11 different weather stations, but not with 30.3039.IT. They may be somehow different.

[@dennisjansen5205]

You're right. They are very different sensors! I didn't realise that. So I will have to figure out what protocol my sensor uses. Did you only use the research paper by Bossard and Lopez and Sanchez?

[@miikakurkela5606]

RFM69(H)CW datasheet. Perhaps you need as a spectral analyzer a cheap RTL-SDR radio www.rtl-sdr.com/rtl-sdr-quick-start-guide/ with the "SDRSharp.exe" program and the "Audacity" program to analyze the broadcasts of your receiver. As said I got a good start with a pair of Adafruit Feather M0 radios learn.adafruit.com/adafruit-feather-m0-radio-with-rfm69-packet-radio/overview And the works of Lopez, Sanches and Bossard.

[@youliantroyanov2941]

awesome.