Heltec v4.3

[Simon-Z87]

2.7.19 M1NL firmware is incompatible with new version Heltec v4.3, because it has new power amplifier module - KCT8103L (instead of Heltec v4.2 with GC1109 power amplifier module). And new power amplifier module is not managed in 2.7.19 M1NL.
May be include powersaving of M1NL in new 2.7.23 version (with v4.3 support) OR move v4.3 KCT8103L power amplifier management from 2.7.23 to 2.7.19 M1NL?

C:\meshtastic\firmware\variants\esp32s3\heltec_v4\variant.h in official repository of 2.7.23 has explaination of difference between Heltec V4.2 with GC1109 PA AND Heltec V4.3 with KCT8103L PA

[Darin755]

https://heltec.org/project/wifi-lora-32-v4/

From the Heltec website:

Hardware version 4.3 requires new firmware.

Meshtastic, please use firmware version 2.7.20 or above. Please note: “Meshtastic UI” is for use with the touchscreen. For ordinary OLED screens, please do not select it.

[Simon-Z87]

Sales of Heltec v4.2 was stopped, because it has been discontinued and is no longer available on marketplaces! For now you can buy only used v4.2. So we need M1NL build of 2.7.20+ for v4.3. And current M1NL is 2.7.19 https://github.com/m1nl/meshtastic-firmware/
In my case Heltec v4.2 works 1 day on official firmware, but works 4 days on M1NL firmware (using 3000mAh Li-Po battery).

[Darin755]

What's M1NL

[Simon-Z87]

It's the custom firmware with energy saving improvements (in 4 times more life on battery)