@tssk said in Which radio / wireless module to choose? Please recommend:

Arduino Pro Mini 3.3V + DHT22 or BME280 + 433/868 radio module

Hello, I am going to take my first steps with the MySensors library. I found this Mega328p + RFM69HCW kit:
https://www.aliexpress.com/item/33006101437.html?spm=a2g0s.9042311.0.0.3f774c4dIx4PVw

I find this development board interesting:

• accepts many RFMs
• possibility of soldering an antenna wire or SMA or uFL connector.
• No voltage indicator led, but a 3.3v regulator (which can be unsoldered). A blue led connected to a gpio.
• known 328p microcontroller (arduino compatible)
• connector for FTDI
• possibility of soldering an additional FLASH ROM
• many gpio available

I am waiting for the schematics and software included, from the seller to say more. For now, the blue led flashes once powered on, but no return to the serial link ... I will post more news if the topic is requesting ;)

here is an example of realization which works for me (I have an RFM69).
I transmit temperature, humidity and pressure atmosphere all 30s and sleep. (BMP280 SHT30)
the TP4056: charges and protects the LI-ION against overvoltage and undervoltage (approx 2.7v)
There is surely to criticize or optimize the scheme: power of the solar panel, the battery, the buck Boost etc.
But in the state, it can transmit for 4 days of rain without sunshine (after a full charge in the sun).