[Bug]: emojis sent via JSON messages to the public broker are lost

[ondras]

Category

Other

Hardware

Heltec V3

Firmware Version

v2.5.5.e182ae7

Description

This might not be the proper repository to file an issue against. I was unable to find a better one.

Nodeinfo JSON messages sent to a public MQTT broker are somewhat broken: their longname fields have their emojis replaced with \u0000.

Apparently, the public MQTT broker has issues with emojis (not sure which codepoints in particular -- perhaps those outside of BMP?). My reproducible example using mosquitto_sub and mosquitto_pub:

// publisher
$ mosquitto_pub -t "msh/test" -h mqtt.meshtastic.org -u meshdev -P large4cats -i test2 -m "hi"
$ mosquitto_pub -t "msh/test" -h mqtt.meshtastic.org -u meshdev -P large4cats -i test2 -m "hi 💩"


// subscriber
$ mosquitto_sub -t "msh/test" -h mqtt.meshtastic.org -u meshdev -P large4cats -i test
hi

Note the second missing message. Now compare with my own mosquitto server:

// publisher
$ mosquitto_pub -t "msh/test" -h mqtt.home -i test2 -m "hi 💩"


// subscriber
$ mosquitto_sub -t "msh/test" -h mqtt.home -i test
hi 💩

Relevant log output

No response