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+--- Thread: AIO connection rs485 modbus temperature humididty sensor (/showthread.php?tid=4306)
AIO connection rs485 modbus temperature humididty sensor - Tolyanskiy - 02-13-2024
Hi! I have a problem with connect CWT-TH03S Series RS485 temperature humidity sensor to my AIO board.
This is my esphome code :
uart:
id: mod_bus
tx_pin: 33
rx_pin: 32
baud_rate: 9600
stop_bits: 1
parity: EVEN
modbus:
id: modbus1
uart_id: mod_bus
send_wait_time: 200ms
modbus_controller:
- id: temp_hum_meter
modbus_id: modbus1
address: 0x03
update_interval: 5s
sensor:
- platform: modbus_controller
modbus_controller_id: temp_hum_meter
name: "Temperature"
id: modbus_temperature
register_type: holding
address: 0x00
unit_of_measurement: "%rh"
value_type: FP32
accuracy_decimals: 1
- platform: modbus_controller
modbus_controller_id: temp_hum_meter
name: "Humifdity"
id: modbus_humidity
register_type: holding
address: 0x01
unit_of_measurement: "℃"
value_type: FP32
accuracy_decimals: 1
And in log file i have this errors
[W][modbus_controller:136]: Duplicate modbus command found: type=0x3 address=1 count=2
[20:30:21][D][modbus_controller:043]: Modbus command to device=3 register=0x01 countdown=0 no response received - removed from send queue
What i doing wrong? Please help.
RS485 comunication parameters
20:2
RE: AIO connection rs485 modbus temperature humididty sensor - admin - 02-14-2024
do you want AIO work as "MASTER", your sensor work as "SLAVE"?
RE: AIO connection rs485 modbus temperature humididty sensor - Tolyanskiy - 02-14-2024
(02-14-2024, 01:12 AM)admin Wrote: do you want AIO work as "MASTER", your sensor work as "SLAVE"?
Yes AIO board - MASTER Sensor - SLAVE
Previously, I changed the baud rate, which was by default 4800, to 9600. I also changed the default SLAVE address , which was by default 1 to 3. Therefore, I wrote these parameters in the code.