Leonardo GPRS GSM IoT Board-V1.2The Leonard GPRS GSM IoT Board is an integrated board which based on the Leonardo. It is composed of SIM800C, Leonardo, relay switches and so on. The SIM800C receives phone messages from the GSM phone network. Whats more, the system provides four switch interfaces so that you can compatible with your design easily, and it also can connect USB power with a single charger. The Leonardo GPRS GSM IOT can receive messages to control and operate relay
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