LILYGO T-LoRa V2.1-1.6 not work with Meshcore 1.9

[giobbe70]

LILYGO T-LoRa V2.1-1.6 not work with Meshcore 1.9 with Meshcore 1.5 work well
Hardware is ESP 32 Lora sx1278 display on Gpio 20 and 21
Thanks
Giobbe

[recrof]

hi there, we will need more information about "not working" to be able to bugfix / help with the issue.

[giobbe70]

after flash, Display is off, bluethoot not work.
(Meshtastic work well)

ttgo-lora32-v1 ; LILYGO T-LoRa V2.1-1.6 ESP32 with SX1276

[jeroenkl]

same issue

[ThomasFarstrike]

I installed it on a LILYGO TTGO-LoRa32 V1.0 (act of desperation) and got this on the serial port, maybe it helps:

rst:0x1 (POWERON_RESET),boot:0x17 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0030,len:1184
load:0x40078000,len:13232
load:0x40080400,len:3028
entry 0x400805e4
[   902][E][Wire.cpp:499] requestFrom(): i2cWriteReadNonStop returned Error -1
[  1913][E][Wire.cpp:513] requestFrom(): i2cRead returned Error 263
[  2921][E][Wire.cpp:513] requestFrom(): i2cRead returned Error 263
(repeats)

I'm looking for confirmation on whether the TTGO-LoRa32 V1.0 can still be made to work, self compiled or something...

[sgrimee]

@giobbe70 do you know (from the order invoice) if you ordered the TCXO version?
LilyGo sold a TCXO version for a while which is not compatible with the mainstream version. I do not know how to tell one from the other in software, part number or visual inspection (I only have the TCXO module and it looks just like the picture with the same revision number).
I had the same problem as you and made a PR for this: #1168
The PR is under discussion but solves the problem for me. Maybe you want to compile from that branch and see if it works for you? This sets GPIO 33 to high, which may or may not damage the hardware on non-tcxo devices, but is required on the tcxo version.

[sisari]

See #1212 might be root cause !

[sgrimee]

See #1212 might be root cause !

thanks for reaching out @sisari. But how would the PR above solve the problem then? It foes not change the power settings AFAIK.