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Added information on how to flash firmware without re-pairing (#1045)

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* Added information on how to flash firmware without re-pairing

* Fixed typos and added `permit_join` info

* Update index.md
This commit is contained in:
Bruceforce
2019-02-08 18:29:07 +01:00
committed by Koen Kanters
parent e40a3ba3bf
commit a497cf0457
3 changed files with 25 additions and 1 deletions
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docs/getting_started/flashing_the_cc2531.md
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*NOTE 1: The following instructions assume you have a CC Debugger. In case you don't, see [Alternative firmware flashing methods](../information/alternative_flashing_methods.md).*
*NOTE 2: When you have already flashed the stick and paired devices to it, reflashing it requires to re-pair all your devices!*
*NOTE 2: When you have already flashed the stick and paired devices to it, reflashing it requires to re-pair all your devices! You can try to avoid this (see: [Flashing without re-pairing](../information/flashing_without_re-pairing.md))*
## Windows
1. Install [SmartRF Flash programmer](http://www.ti.com/tool/FLASH-PROGRAMMER) (**NOT V2**). This software is free but requires a Texas Instruments account in order to download.
docs/index.md
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@@ -45,3 +45,4 @@ Welcome to the Zigbee2mqtt documentation!
* [CC sniffer devices](information/cc_sniffer_devices.md)
* [Alternative flashing methods](information/alternative_flashing_methods.md)
* [Running Zigbee2mqtt in Virtual Environment](information/virtual_environment.md)
* [Flashing without re-pairing](information/flashing_without_re-pairing.md)
docs/information/flashing_without_re-pairing.md
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# Flashing without re-pairing
## Why do I need to re-pair?
Flashing firmware usually requires re-pairing of all connected [routers](zigbee_network.md#Router).
If you remove the coordinator from the network, the remaining routers (e.g. bulbs) can still communicate with each other and they still form a zigbee network.
If you now flash the coordinator and try to bring it back to the network, it will use its old `pan_id` incremented by one.
So if you used the default `pan_id: 0x1a62` your coordinator will now use `pan_id: 0x1a63`.
This will result in a new PAN (personal area network) with no connection to the old one.
This means that you have to follow the instructions on how to [pair a device](../getting_started/pairing_devices.md) again for every router that was connected to the coordinator.
## How to avoid re-pairing
You can try to avoid this by bringing your coordinator out of range from your other network devices. There are multiple options to achieve this:
* Shield the coordinator with tinfoil
* Take the coordinator physically out of range (e.g. drive to a nice place with your coordinator)
* Cut the power of all connected routers
Once you are outside the network range you can [flash the coordinator with the new firmware](../getting_started/flashing_the_cc2531.md) and start zigbee2mqtt.
After zigbee2mqtt started successfully, you can shutdown zigbee2mqtt and bring the coordinator back in network range.
Your coordinator should now use the old `pan_id` and therefore be in the same PAN as before.
You need to set `permit_join: true` and wait a few minutes to let your devices reconnect.