SMLIGHT SLZB-07p7 no Hardware flow control support?

[eXitus01]

The SMLIGHT SLZB-07p7 is supported in Zigbee2MQTT, but hardware flow control is not supported although the adapter is capable of it.
As soon as you set rtscts: true, you get the following error:

[07:42:04] INFO: Preparing to start...
[07:42:04] INFO: Socat not enabled
[07:42:04] INFO: Starting Zigbee2MQTT...
Starting Zigbee2MQTT without watchdog.
[2025-02-17 07:42:05] info: z2m: Logging to console, file (filename: log.log)
[2025-02-17 07:42:05] info: z2m: Starting Zigbee2MQTT version 2.1.1 (commit #unknown)
[2025-02-17 07:42:05] info: z2m: Starting zigbee-herdsman (3.2.5)
[2025-02-17 07:42:05] error: z2m: Error while starting zigbee-herdsman
[2025-02-17 07:42:05] error: z2m: Failed to start zigbee-herdsman
[2025-02-17 07:42:05] error: z2m: Check https://www.zigbee2mqtt.io/guide/installation/20_zigbee2mqtt-fails-to-start_crashes-runtime.html for possible solutions
[2025-02-17 07:42:05] error: z2m: Exiting...
[2025-02-17 07:42:06] error: z2m: Error: USB adapter discovery error (No valid USB adapter found). Specify valid 'adapter' and 'port' in your configuration.
at discoverAdapter (/app/node_modules/.pnpm/zigbee-herdsman@3.2.5/node_modules/zigbee-herdsman/src/adapter/adapterDiscovery.ts:523:15)
at processTicksAndRejections (node:internal/process/task_queues:105:5)
at Function.create (/app/node_modules/.pnpm/zigbee-herdsman@3.2.5/node_modules/zigbee-herdsman/src/adapter/adapter.ts:68:33)
at Controller.start (/app/node_modules/.pnpm/zigbee-herdsman@3.2.5/node_modules/zigbee-herdsman/src/controller/controller.ts:132:24)
at Zigbee.start (/app/lib/zigbee.ts:69:27)
at Controller.start (/app/lib/controller.ts:142:13)
at start (/app/index.js:161:5)

[chris-1243]

[2025-02-17 07:42:06] error: z2m: Error: USB adapter discovery error (No valid USB adapter found). Specify valid 'adapter' and 'port' in your configuration.

Your log is telling you what is going wrong. Port should be specified as you are on a tcp coordinator. What about adapter ?

Edit: no tcp, SLZB07 is USB....

[eXitus01]

[2025-02-17 07:42:06] error: z2m: Error: USB adapter discovery error (No valid USB adapter found). Specify valid 'adapter' and 'port' in your configuration.

Your log is telling you what is going wrong. Port should be specified as you are on a tcp coordinator. What about adapter ?

The port and adapter are configured and when I have the configuration like this, it works fine:

serial:
  port: /dev/ttyUSB1
  adapter: zstack

However, if I extend the above configuration with RTSC, i.e.:

serial:
  port: /dev/ttyUSB1
  adapter: zstack
  rtscts: true

you get the error I originally posted.

[chris-1243]

Have you tried to specify the baudrate?

serial:
  port: /dev/ttyUSB1
  adapter: zstack
  baudrate: 115200
  rtscts: true

[eXitus01]

serial:
port: /dev/ttyUSB1
adapter: zstack
baudrate: 115200
rtscts: true

No, I hadn't tried that before, but I tested it now. It also leads to the same error:

[08:32:32] INFO: Preparing to start...
[08:32:32] INFO: Socat not enabled
[08:32:32] INFO: Starting Zigbee2MQTT...
Starting Zigbee2MQTT without watchdog.
[2025-02-18 08:32:33] info: z2m: Logging to console, file (filename: log.log)
[2025-02-18 08:32:33] info: z2m: Starting Zigbee2MQTT version 2.1.1 (commit #unknown)
[2025-02-18 08:32:33] info: z2m: Starting zigbee-herdsman (3.2.5)
[2025-02-18 08:32:33] info: zh:adapter:discovery: Matched adapter: {"path":"/dev/ttyUSB1","manufacturer":"SMLIGHT","serialNumber":"0ea8bc1fa277ed11871deefafdf7b791","pnpId":"usb-SMLIGHT_SMLIGHT_SLZB-07p7_0ea8bc1fa277ed11871deefafdf7b791-if00-port0","vendorId":"10c4","productId":"ea60"} => zstack: 4
[2025-02-18 08:32:33] info: zh:zstack:znp: Opening SerialPort with {"path":"/dev/ttyUSB1","baudRate":115200,"rtscts":true,"autoOpen":false}
[2025-02-18 08:32:33] info: zh:zstack:znp: Serialport opened
[2025-02-18 08:32:33] info: zh:zstack:znp: Writing CC2530/CC2531 skip bootloader payload
[2025-02-18 08:32:35] info: zh:zstack:znp: Skip bootloader for CC2652/CC1352
[2025-02-18 08:32:53] error: z2m: Error while starting zigbee-herdsman
[2025-02-18 08:32:53] error: z2m: Failed to start zigbee-herdsman
[2025-02-18 08:32:53] error: z2m: Check https://www.zigbee2mqtt.io/guide/installation/20_zigbee2mqtt-fails-to-start_crashes-runtime.html for possible solutions
[2025-02-18 08:32:53] error: z2m: Exiting...
[2025-02-18 08:32:53] error: z2m: Error: Failed to connect to the adapter (Error: SRSP - SYS - ping after 6000ms)
at ZStackAdapter.start (/app/node_modules/.pnpm/zigbee-herdsman@3.2.5/node_modules/zigbee-herdsman/src/adapter/z-stack/adapter/zStackAdapter.ts:113:27)
at Controller.start (/app/node_modules/.pnpm/zigbee-herdsman@3.2.5/node_modules/zigbee-herdsman/src/controller/controller.ts:136:29)
at Zigbee.start (/app/lib/zigbee.ts:69:27)
at Controller.start (/app/lib/controller.ts:142:13)
at start (/app/index.js:161:5)

[chris-1243]

So it might be related to the firmware you are using