add RS485 Gateway to Example

[DaTTcz]

Related area

Example Code

Hardware specification

ESP32-C6

Is your feature request related to a problem?

Hi, I would like to ask for some sample code for a gateway between RS-485 and Zigbee.

Describe the solution you'd like

I want to expand the Zigbee network using an RS-485 network. I will have several ESP32-C6 connected via RS-485. The first ESP32-C6/RS485 will be connected to the Zigbee coordinator via Zigbee. The coordinator will then use RS485 to connect to the second to Xth ESP32-C6/485, which will allow Zigbee devices to be registered with the coordinator. I hope I have described it clearly enough. Thank you.

Describe alternatives you've considered

No response

Additional context

No response

I have checked existing list of Feature requests and the Contribution Guide

• I confirm I have checked existing list of Feature requests and Contribution Guide.

[BitBrokerEU]

If you want to build a gateway I think you also need states of connected ZIGBEE EPs
This is a problem that I need to solve my Feature request
How to get the state of a ZIGBEE EP i.e. a lamp
Do you have a solution or is there already an example?

[SuGlider]

I want to expand the Zigbee network using an RS-485 network.

I think that this is an specific user gateway application implementation. It is not a Zigbee feature.
There are many RS485 Arduino Libraries for ESP32 SoCs.
Is it going to use Modbus? Or some proprierary protocol?

The gateway shall implement both sides, with message/protocol translation.

This issue will be migrated to Discussions.

[SuGlider]

A possible solution could be some Home Assistant based integration to read/write Modbus packets and send/receive Zigbee trnalated packets.

[DaTTcz]

In this example
Zigbee_Gateway.ino

Are raw Zigbee communications sent to the UART port?
If so, that would be ideal.

/* Zigbee gateway configuration */
#define GATEWAY_ENDPOINT_NUMBER 1
#define GATEWAY_RCP_UART_PORT UART_NUM_1 // UART 0 is used for Serial communication
#define GATEWAY_RCP_RX_PIN 4
#define GATEWAY_RCP_TX_PIN 5

[BitBrokerEU]

I thing the function ZigbeeThermostat::zbAttributeRead is the right approach.

We need for a gateway a function (callback) - based on this - with returned information about the state of a given endpoint(s)!
In ZigbeeThermostat::zbAttributeRead the return result is the tmperature what is recognized by the attribute ESP_ZB_ZCL_CLUSTER_ID_TEMP_MEASUREMENT...
This should also possible for light, color, shutter and other states.
I don't find the definition from ESP_ZB_ZCL_CLUSTER_ID_TEMP_MEASUREMENT and have no knowledge to find out for other EPs.

Can someone create a message/state wrapper of given EPs for us (see also How to get the state of a ZIGBEE EP i.e. a lamp) as an example?

[SuGlider]

@P-R-O-C-H-Y - maybe you can add some information to this discussion. Thanks.