The Dragino RS485-LN is a RS485 to LoRaW...
The R718PA3 is a wireless communication ...
DC-20 is based on geomagnetic + 24G mic...
Water conductivity sensor for measuring ...
The R312A is an emergency button switch device that detects the closing or opening signal of the emergency button switch and sends an alarm signal to the gateway for processing. It uses the SX1276 wireless communication module.