Error Code 3

[icsHaLl]

Hello I use esp32 UART to communication with MH-Z19 MH-Z19C

than, I tried the example ErrorCodes and I got message

Sent << DEC: 255 1 133 0 0 0 0 0 122
Received >> DEC: 66 77 9 129 8 200 3 52 1 ERROR Code: 3 Failed to receive CO2 value - Error Response Code: 3 Sent << DEC: 255 1 133 0 0 0 0 0 122
Received >> DEC: 66 77 9 129 8 200 3 52 1 ERROR Code: 3 Failed to receive CO2 value - Error Response Code: 3 Sent << DEC: 255 1 133 0 0 0 0 0 122
Received >> DEC: 66 77 9 130 8 198 3 51 1 ERROR Code: 3 Failed to receive CO2 value - Error Response Code: 3 Sent << DEC: 255 1 133 0 0 0 0 0 122
Received >> DEC: 66 77 9 130 8 198 3 51 1 ERROR Code: 3 Failed to receive CO2 value - Error Response Code: 3 Sent << DEC: 255 1 133 0 0 0 0 0 122
Received >> DEC: 66 77 9 130 8 199 3 50 1 ERROR Code: 3 Failed to receive CO2 value - Error Response Code: 3 Sent << DEC: 255 1 133 0 0 0 0 0 122
Received >> DEC: 66 77 9 131 8 199 3 49 1 ERROR Code: 3 Failed to receive CO2 value - Error Response Code: 3

Could you help me please?

Thank you @WifWaf