Hello Erik,
Thanks for your quick reply.
I use the right UID instead XYZ (EJi)
I think it's not a quoting issue because when I don't put correct quotes, I get:
{"_ERROR": "Could not parse payload for write_frame call of dmx_bricklet EJi as JSON: Extra data: line 1 column 4 (char 3)"}
I also have a Segment Display 4x7 Bricklet and use similar synthax for function "set_numeric_value" and it work well.
My MQTT bindings version is
tinkerforge_mqtt 2.0.15
I try other function like "get_dmx_mode", "read_frame", "set_dmx_mode" and "get_dmx_mode". It work perfectly. Here is output of "get_identity":
{"uid": "EJi", "connected_uid": "Lnk", "position": "a", "hardware_version": [1, 0, 0], "firmware_version": [2, 0, 3], "device_identifier": "dmx_bricklet", "_display_name": "DMX Bricklet"}
Thanks for your help
Jérémie