example project: https://github.com/arttupii/EspNowFloodingMesh/tree/master/arduinoSlaveNode/main
"MQTT myDeviceName"
S:device1/led/value
"
"MQTT myDeviceName"
U:device1/led/value
"
"MQTT myDeviceName"
G:device1/led/value
"
"MQTT myDeviceName"
P:device1/led/value on
"
"MQTT myDeviceName"
G:device1/switch/led/value
S:device1/switch/led/set
G:device1/switch/led1/value
S:device1/switch/led1/set
G:device1/temp/dallas1/value
G:device1/temp/dallas2/value
G:device2/switch/led/value
S:device2/switch/led/set
"
"MQTT myDeviceName"
G:device1/switch/led/value -->Topic is device1/switch/led/value
S:.../set -->Topic is device1/switch/led/set
G:../led1/value -->Topic is device1/switch/led1/value
S:.../set -->Topic is device1/switch/led1/set
G:./temp/dallas1/value -->Topic is device1/temp/dallas1/value
G:../dallas2/value -->Topic is device1/temp/dallas2/value
G:device2/switch/led/value -->Topic is device2/switch/led/value
S:.../set -->Topic is device2/switch/led/set
"