Chengdu Ebyte Electronic Technology Co., Ltd.
E810-TTL-CAN01 User Manual
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Chengdu Ebyte Electronic Technology Co., Ltd.
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5.2 Command overview
The AT command refers to the instruction set that the user transmits commands through the UART and
the module in the command mode. The format of the AT command is explained in detail later. After power-on,
switch to configuration mode and set the module through UART.
Timing for switching from transparent mode to command mode:
The serial device continuously sends "+++" to the module. After the module receives "+++", the 3 second
timer expires and starts to start. If any AT command is received within the timeout period, the switch is
successfully switched to the configuration mode.
Finally, the serial device sends the command "AT+ EXAT" to the module. After receiving the command,
the module returns "+OK" and exits the configuration. Then short-circuit the reset RESET pin and the
parameters take effect. It is also possible to reset the module with the command "AT+REBT" after successful
configuration with the AT command parameters.
Note: After the parameters are configured, the parameters must be valid after the reset.
Description: <CR>: ASCII code 0x0D
<LF>: ASCII code 0x0A
5.3 Command error code
Error code
Description
-1
Invalid command format
-2
Invalid command
-3
Invalid operator
-4
Invalid parameter
-5
Operation not allowed
5.4 Command list
AT
Test command
CANFLT
Inquire/set CAN filter info.
CAN
Inquire/set CAN transmit parameter info.
EXAT
Exit AT command
E
Inquire/set AT command echo
MODBUSID
Inquire/set MODBUS ID
