LORA for BRESSER 5 in1 Weather Station (MAKE IOT)

This afternoon I had the time to adapt the code to a TTGO Lora 32 T3 V1.6 Board.

This makes it very easy for LORA beginner to add support

All you need to change on the hardware is one solder bridge: Connect GPIO1 of the LORA Module to the free GPIO12

like shown in the picture:

You may find my Arduino code here:

https://github.com/Uspizig/Bresser_Weather_NEW/tree/main/WeatherDecoder_LORA_RFM95Only

Finally I could achieve decoding without using a CC1101 and transmit to LoRA via TTN Network the Data.

I purely use RFM for both

Deocding of the Bresser Weather station

Once finished this data is transmitted over the RFM95 to the TheThingsNetwork

You may find several resoureces on the web where people tried to decode Bresser Weather station data with an RTL SDR Stick.

In my opinion running a Rasp Pi just for decoding some RF Weather data is a overkill of resources.

There ought to be a smarter solution!!!

The Bresser Weather Stations transmits trhe data in an FSK Modulation:

You may find detailed information about the proticol here: or here. I cant explain it better than they did.

Based on this idea I started to search for a decoder and foudn a CC1101 Chip. I call it the swiss army knife of RF Recivers.

With this Receiver and the Lib Radiolib you may decode a lot of stuff easily.

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This is how the game begun:

With some help of the Twitter community I finally got it to work:

To receive the signals produced by the Bresser Weather Station I designed in Kicad a small Hardware layout.

This Board consist of a ESP32-PicoD4 Microcontroller, an RGB LED, 7 GPIO Pins, a Voltage supply and a LORA CHIP RFM95.

Hint: This Board is optional and not mandatory. You may use any other Board e.g. from Lilygo which has a valid SX127x Chip from Semtech.

The benefit of my own design is the formfactor.. I wanted it to be as small as possible. 

You may find the Schematics here: 

Hardware FIles

Right now you need to add anCC1101 Receiver to this Hardware. You may find these Boards cheap on Ebay

I am about to check weather this CC1101 Chip can be removed and everything is handled by the RFM95 LoRa Chip alone.

The Bad/ugly thing about this CC1101 Module is the PinDistance is 2mm while most development Boards have a pin distance of 2.54 mm.

To Connect this CC1101 To the Board with a standard 3.3V, GND, 4GPIOs you may need one of these adapter board that I found on Amazon.

They adapt the distance to your needs.

Next you may solder these Pins straight forward: Pinning might be found here Link:

Luckily these fits to most headers on development Boards

Right now on a holiday in Bavaria.... Be right back.