SIM800 UART TTL GSM Modem Module With SMA Antenna Waveshare Modbus RTU 8-channel Relay Module RS485 Technical documentation and pinout guide
USD752.07
USD799.07
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Description
SIM800 UART TTL GSM Modem Module With SMA Antenna Waveshare Modbus RTU 8 channel Relay Module RS485 Technical documentation and pinout guide Technical documentation and pinout guide the module works with Arduino
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