do you want only use by 4G module, not need to use RS485 , right?
because RS485 and 4G module use same serial port. if you not need to use RS485, you need remove IC:U26 (74LVC1G125) . Then you can use 4G module.
we have update KCS A8M firmware for V2.2.4 to solve the 4G module problem. just download it directly to use.
KCS_KC868_A8M_V2.2.4.zip (Size: 764.48 KB / Downloads: 59)
because RS485 and 4G module use same serial port. if you not need to use RS485, you need remove IC:U26 (74LVC1G125) . Then you can use 4G module.
we have update KCS A8M firmware for V2.2.4 to solve the 4G module problem. just download it directly to use.
KCS_KC868_A8M_V2.2.4.zip (Size: 764.48 KB / Downloads: 59)