Failed to Identify Jablotron services and devices

[sarzwest]

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Failed to Identify Jablotron services and devices

Describe The Problem:
When I install jablotron plugin and want to process chapter https://github.com/fdegier/homebridge-jablotron-alarm#Identify-Jablotron-services-and-devices i get unchecked error.

To Reproduce:
node config-helper.js <username> <password>

Logs:

Jablotron - json parsing error: TypeError: Cannot read properties of undefined (reading 'forEach')
    at /homebridge/node_modules/homebridge-jablotron/config-helper.js:154:26
    at /homebridge/node_modules/homebridge-jablotron/lib/jablotron-client.js:57:17
    at IncomingMessage.<anonymous> (/homebridge/node_modules/homebridge-jablotron/lib/jablotron-client.js:118:21)
    at IncomingMessage.emit (node:events:531:35)
    at endReadableNT (node:internal/streams/readable:1696:12)
    at process.processTicksAndRejections (node:internal/process/task_queues:82:21)
Unable to parse JSON data: {"data":{"service-states":{"service-name":"Tun\u011bchody"},"states":[]},"http-code":200}
{"hostname":"api.jablonet.net","port":443,"path":"/api/2.2/JA100/thermoDevicesGet.json","method":"POST","timeout":20000,"headers":{"Cookie":"PHPSESSID=l6jn96ue39d8v5sllihb3ip9h3","x-vendor-id":"JABLOTRON:Jablotron","Content-Type":"application/json","x-client-version":"MYJ-PUB-ANDROID-12","accept-encoding":"*","Accept":"application/json","Accept-Language":"en"}}

Environment:

• Homebridge Version: v3.1.4
• Node Version: v20.15.0
• Homebridge-jablotron plugin version: v3.1.4
• Operating System and OS Version: Docker

[DannyRicar]

This workaround fixed the issue for me.

It looks like the Jablotron API sometimes returns a successful response, but without the thermo-devices field. In my case, the response only contained states: [], so the script tried to run .forEach() on undefined, which caused the crash.

I fixed it by adding a fallback empty array when no thermostat devices are returned.

Run these commands:

cd /var/lib/homebridge/node_modules/homebridge-jablotron

cp config-helper.js config-helper.js.bak

sed -i "s/let sections = response\['data'\]\['thermo-devices'\];/let sections = response['data']['thermo-devices'] || [];/g" config-helper.js

This creates a backup of the original file and then changes the script so that, if thermo-devices is missing from the API response, it uses an empty array instead of crashing.

After that, run the config helper again:

node config-helper.js your@email.com yourpassword

This worked for me because I do not have any thermostat devices returned by the Jablotron API, but the plugin still expected them to exist.