Conbee III to zigbee2mqtt ( New)

I need help here. I have followed this guide and installed MQTT. In the Zigbee2MQTT configuration, I have added:
mqtt:
server: ‘mqtt://core-mosquitto:1883’
user: mqtt_user
password: mqtt_password

serial:
port: /dev/serial/by-id/usb-dresden_elektronik_ConBee_III_DE0055886-if0o-port0
adapter: deconz

I added these lines, but when I started Zigbee2MQTT, I got this error:
this is new
1st error
Failed to save add-on configuration, Missing option ‘mqtt’ in root in Zigbee2MQTT (45df7312_zigbee2mqtt). Got {‘data_path’: ‘/config/zigbee2mqtt’, ‘socat’: {‘enabled’: False, ‘master’: ‘pty,raw,echo=0,link=/tmp/ttyZ2M,mode=777’, ‘slave’: ‘tcp-listen:8485,keepalive,nodelay,reuseaddr,keepidle=1,keepintvl=1,keepcnt=5’, ‘options’: ‘-d -d’, ‘log’: False}, ‘serial’: {‘port’: ‘/dev/serial/by-id/usb-dresden_elektronik_ConBee_III_DE0055886-if0o-port0’, ‘adapter’: ‘deconz’}}
2nd error before in the log file it has come like below - im very new to HA
[2024-12-10 23:11:54] info: z2m: Logging to console, file (filename: log.log)[2024-12-10 23:11:54] info: z2m: Starting Zigbee2MQTT version 1.42.0 (commit #unknown)[2024-12-10 23:11:54] info: z2m: Starting zigbee-herdsman (2.1.9)[2024-12-10 23:11:58] error: z2m: Failed to call ‘Frontend’ ‘stop’ (TypeError: Cannot read properties of undefined (reading ‘close’) at /app/lib/extension/frontend.ts:126:52 at new Promise () at Frontend.stop (/app/lib/extension/frontend.ts:126:15) at Controller.callExtensions (/app/lib/controller.ts:399:17) at Controller.stop (/app/lib/controller.ts:265:9) at stop (/app/index.js:165:5) at process.handleQuit (/app/index.js:173:13))[2024-12-10 23:11:58] error: z2m: Not connected to MQTT server![2024-12-10 23:11:58] error: z2m: Cannot send message: topic: ‘zigbee2mqtt/bridge/state’, payload: 'offline[2024-12-10 23:11:58] info: z2m: Disconnecting from MQTT server[2024-12-10 23:11:58] info: z2m: Stopping zigbee-herdsman…[2024-12-10 23:11:58] info: z2m: Stopped zigbee-herdsman[2024-12-10 23:11:58] info: z2m: Stopped Zigbee2MQTT
[2024-12-10 23:10:46] info: z2m: Starting zigbee-herdsman (2.1.9)[2024-12-10 23:10:56] error: z2m: Error while starting zigbee-herdsman[2024-12-10 23:10:56] error: z2m: Failed to start zigbee[2024-12-10 23:10:56] error: z2m: Check Zigbee2MQTT fails to start | Zigbee2MQTT for possible solutions[2024-12-10 23:10:56] error: z2m: Exiting…[2024-12-10 23:10:56] error: z2m: Error: TIMEOUT at Driver.processBusyQueue (/app/node_modules/zigbee-herdsman/src/adapter/deconz/driver/driver.ts:515:28)

I had the same issue, the connection to the conbee(III in my case) timed out.

I changed the config for the serial to the following and then it started up nicely:

’’’
adapter: deconz
port: /dev/ttyUSB0
baudrate: 115200
rtscts: false
’’’

Earlier post said ”adapter: second”, didnt notice the auto-correct demon struck again, now its corrected.