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and a label has been applied to the back of the board with a calibration value which can be used in your calculations to increase measurement accuracy
you can try formatting the SD card and re-place the music files
which offers a reliable FSK or OOK communication solution
such as high-efficiency factor
Extendable functionalities
TG501 Industrial Cellular LTE CAT M1/NB-IoT Mini RTU with rich I/O Supports RS-232/485/422 I/O Helium and a label has beenTG501 Industrial Cellular LTE CAT M1 NB IoT Mini RTU with rich I O Supports RS 232 485 422 I O Compatible with global LTE CAT M1 NB IoT Modbus TCP RTU, MQTT, TCP UDP protocols Up to 16MB Local data storage, support 5 data centres SMS alarm and AT command 2 RS232, 1 RS485, 3 ADC, 2 DI, 2 Relay, 1 power output Secure and transparent data transmission Built in standard TCP IP stack, supports up to 5 data centres for synchronous and transparent data