This is a module for environmental sensing There are DHT22 Temperature and humidity sensor, PM2.5 sensor. And there ard OLED monitor, LoRa(SX1278), ESP01(ESP8266) module for communication. I draw a circuit board by myself, use nuvoton nano100 as mcu.
I build a LoRa mesh network between my gateway and client. Client collect environmental data like temperature, humidity or PM2.5. Client send data to gateway by LoRa . Gateway get the data, and upload to Thingspeak