Heltec V4 TFT Expansion KIT - no LoRa Transmiting #240

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opened 2026-10-27 15:45:26 +01:00 by adam · 5 comments
Owner

Describe the bug
Heltec V4 TFT Expansion KIT - no LoRa Transmiting - spectrum analyze show - no transmitting in air.

Which device are you using
Heltec V4 TFT Expansion KIT

Which Firmware are you using
v0.9.12

To Reproduce
Steps to reproduce the behavior:

  1. flash full or merged firmware
  2. try to send some text - spectrum analyze show no transmitting in air.

Additional context
try to do full erase and flash firmware again - but same result

**Describe the bug** Heltec V4 TFT Expansion KIT - no LoRa Transmiting - spectrum analyze show - no transmitting in air. **Which device are you using** Heltec V4 TFT Expansion KIT **Which Firmware are you using** v0.9.12 **To Reproduce** Steps to reproduce the behavior: 1. flash full or merged firmware 2. try to send some text - spectrum analyze show no transmitting in air. **Additional context** try to do full erase and flash firmware again - but same result <!-- github-sync-id:4359832151 -->
Author
Owner

Or transmission is poor low power

Or transmission is poor low power <!-- github-comment-id:4354553044 -->
Author
Owner

Or transmission is poor low power

what settings you are using in the Mgmt / Radio?

> Or transmission is poor low power what settings you are using in the Mgmt / Radio? <!-- github-comment-id:4355319714 -->
Author
Owner

868.731 Mhz / 62.5 bandwidth / SP 7 / CR 4-7 / 22 dbm, as is in other Meshcore firmwares

868.731 Mhz / 62.5 bandwidth / SP 7 / CR 4-7 / 22 dbm, as is in other Meshcore firmwares <!-- github-comment-id:4355354018 -->
Author
Owner

Transmission exist, but TX power more lower then in Heltec MeshPocket on 22dbm

Transmission exist, but TX power more lower then in Heltec MeshPocket on 22dbm <!-- github-comment-id:4355366247 -->
Author
Owner

Interesting, on my heltecV4 Expansion Kit its working.
still, i will dig into it!

Interesting, on my heltecV4 Expansion Kit its working. still, i will dig into it! <!-- github-comment-id:4355665019 -->
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Reference: adam/meshcore#240