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Radio: https://store.rakwireless.com/products/wisblock-starter-kit?variant=41786582925510 Charger: https://www.adafruit.com/product/6091 (this one stops the charging if temperature is above 50C or bellow 0C to protect the lion battery, you need to solder a 10k thermistor to it) Solar panel: https://a.aliexpress.com/_Eve6B0g

Thank you ! (Can't zap you for some reason, I receive an error from your wallet's callback)