Please support on uart read/write sample code for quectel m66

IoT Modules GSM Module
1

Dear sir,

we are using m66 opencpu. now we unable to read modbus device register(40001to40004) from m66 port3 .please send code for read/write to modbus device.

2

Hi,May I ask how your device is connected, iic or spi? Please refer to the relevant example in the example (example_iic.c or example_spi.c)