Lilygo RTL433 reboots ever few hours

[puterboy]

Describe the bug
For the past 21+ months, I have been running OMG on 2 separate Lilygo LoRa32 433MHz devices - the devices are generally quite stable though they occasionally reboot (I would say every couple of weeks on average).
I was using the latest dev branch from about August 2024 (v1.7.0-166-g4f26d39b), incorporating several of the bug fixes and enhancements that I worked on with you from that period.
I also set rtl_433_Decoder_Stack=13000 to prevent overflow and reduce crashes.

A couple of weeks ago, I decided to upgrade to the latest dev branch (v1.8.0-90-g647e4373)
But now it crashes every few hours.
Freemem remains consistently above 92K throughout (as with the prior stable version)

I captured the console logs but nothing is remarkable... I just get:

[2026-05-26 10:38:31] N: webUI setup done
[2026-05-26 10:38:33] [  7936][E][Preferences.cpp:50] begin(): nvs_open failed: NOT_FOUND
[2026-05-26 10:38:33] N: RF Config not found using default
[2026-05-26 10:38:33] N: Enable RTL_433 Receiver: 433.92Mhz
[2026-05-26 10:38:33] N: gatewayRTL_433 setup done
[2026-05-26 10:38:33] N: Offline disabled
[2026-05-26 10:38:33] N: OpenMQTTGateway modules: ["LilyGo_SSD1306","WebUI","rtl_433"]
[2026-05-26 10:38:33] N: ************** Setup OpenMQTTGateway end **************
[2026-05-26 10:38:33] N: Reconfiguring MQTT client...
[2026-05-26 10:38:33] N: Update check, free heap: 115384N: Using memory cert
[2026-05-26 10:38:37] N: Update check done, free heap: 67992N: Connected to broker
[2026-05-26 10:38:37] N: [ OMG->MQTT ] topic: home3/OMG_lilygo_rtl_433_ESP-3/LWT msg: online
[2026-05-26 10:38:37] N: SYS json: {"uptime":11,"version":"1technophile [May 14 2026 09:06:50]","mqtt":true,"serial":false,"disc":true,"env":"lilygo-rtl_433-jjk-ota","freemem":101800,"mqttp":"1883","mqtts":false,"mqttv":false,"msgprc":0,"msgblck":0,"msgrcv":14,"maxq":0,"cnt_index":0,"minmem":56204,"tempc":51.11,"freestck":3948,"powermode":-1,"eth":false,"rssi":-72,"SSID":"pretendlink-2.4","BSSID":"3C:37:86:7B:BF:3B","ip":"192.168.1.115","mac":"F0:24:F9:90:9E:10","modules":"'LilyGo_SSD1306', 'WebUI', 'rtl_433'","origin":"/SYStoMQTT"}
[2026-05-26 10:38:37] N: [ OMG->MQTT ] topic: home3/OMG_lilygo_rtl_433_ESP-3/RLStoMQTT msg: {"latest_version":"v1.8.1","title":"OpenMQTTGateway","release_url":"https://github.com/1technophile/OpenMQTTGateway/releases/tag/v1.8.1","installed_version":"1technophile [May 14 2026 09:06:50]","entity_picture":"https://github.com/1technophile/OpenMQTTGateway/raw/development/docs/img/Openmqttgateway_logo_mini_margins.png","release_summary":""}
[2026-05-26 10:38:37] N: [ OMG->MQTT ] topic: homeassistant3-rtl433/binary_sensor/F024F9909E10-connectivity/config msg: {"stat_t":"home3/OMG_lilygo_rtl_433_ESP-3/LWT","avty_t":"home3/OMG_lilygo_rtl_433_ESP-3/LWT","dev_cla":"connectivity","name":"SYS: Connectivity","uniq_id":"F024F9909E10-connectivity","pl_on":"online","pl_off":"offline","pl_avail":"online","pl_not_avail":"offline","dev":{"ids":["F024F9909E10"],"name":"OMG_lilygo_rtl_433_ESP-3","mdl":"[\"LilyGo_SSD1306\",\"WebUI\",\"rtl_433\"]","mf":"OMG_community","cu":"http://192.168.1.115/","sw":"1technophile [May 14 2026 09:06:46]"}}
...
...
[2026-05-26 21:11:12] N: [ OMG->MQTT ] topic: home3/OMG_lilygo_rtl_433_ESP-3/RTL_433toMQTT/Nexus-TH/3/169 msg: {"model":"Nexus-TH","id":169,"channel":3,"battery_ok":1,"temperature_C":21.1,"humidity":50,"protocol":"Nexus, FreeTec NC-7345, NX-3980, Solight TE82S, TFA 30.3209 temperature/humidity sensor","rssi":-70,"duration":751000}
[2026-05-26 21:11:19] N: [ OMG->MQTT ] topic: home3/OMG_lilygo_rtl_433_ESP-3/RTL_433toMQTT/LaCrosse-TX141THBv2/1/225 msg: {"model":"LaCrosse-TX141THBv2","id":225,"channel":1,"battery_ok":1,"temperature_C":-14.9,"humidity":78,"test":"No","mic":"CRC","protocol":"LaCrosse TX141-Bv2, TX141TH-Bv2, TX141-Bv3, TX141W, TX145wsdth, (TFA, ORIA) sensor","rssi":-73,"duration":145000}
[2026-05-26 21:11:22] rtl_433_ESP(7): Average RSSI Signal -93 dbm, adjusted RSSI Threshold -84, samples 50000
[2026-05-26 21:11:27] N: [ OMG->MQTT ] topic: home3/OMG_lilygo_rtl_433_ESP-3/RTL_433toMQTT/Nexus-TH/1/236 msg: {"model":"Nexus-TH","id":236,"channel":1,"battery_ok":1,"temperature_C":19.9,"humidity":53,"protocol":"Nexus, FreeTec NC-7345, NX-3980, Solight TE82S, TFA 30.3209 temperature/humidity sensor","rssi":-65,"duration":684000}
[2026-05-26 21:11:30] N: [ OMG->MQTT ] topic: home3/OMG_lilygo_rtl_433_ESP-3/RTL_433toMQTT/LaCrosse-TX141THBv2/0/242 msg: {"model":"LaCrosse-TX141THBv2","id":242,"channel":0,"battery_ok":1,"temperature_C":0.9,"humidity":10,"test":"No","mic":"CRC","protocol":"LaCrosse TX141-Bv2, TX141TH-Bv2, TX141-Bv3, TX141W, TX145wsdth, (TFA, ORIA) sensor","rssi":-76,"duration":140000}
[2026-05-26 21:11:32] N: [ OMG->MQTT ] topic: home3/OMG_lilygo_rtl_433_ESP-3/RTL_433toMQTT/Nexus-TH/1/243 msg: {"model":"Nexus-TH","id":243,"channel":1,"battery_ok":1,"temperature_C":22.1,"humidity":53,"protocol":"Nexus, FreeTec NC-7345, NX-3980, Solight TE82S, TFA 30.3209 temperature/humidity sensor","rssi":-59,"duration":704000}
[2026-05-26 21:11:32] <FD><FF><FD><FD><FD><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FD><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF>
<FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF><FF>

(where I added the timestamps)

• Any ideas what might be going wrong?
• Any suggestions on how to better debug?

Thanks!

[NorthernMan54]

In December I updated the rtl_433_ESP code base, you could drop back to the previous version to see if that introduced the issue

[puterboy]

I tried:

git switch --detach 50ff9f535fcb4937995a319448250e433682c9ca^

But it crashed after about 30 minutes with the following message:

[2026-05-27 10:26:39] N: [ OMG->MQTT ] topic: home3/OMG_lilygo_rtl_433_ESP-3/RTL_433toMQTT/Nexus-TH/1/243 msg: {"model":"Nexus-TH","id":243,"channel":1,"battery_ok":1,"temperature_
C":21.8,"humidity":54,"protocol":"Nexus, FreeTec NC-7345, NX-3980, Solight TE82S, TFA 30.3209 temperature/humidity sensor","rssi":-58,"duration":690996}
[2026-05-27 10:26:43] N: [ OMG->MQTT ] topic: home3/OMG_lilygo_rtl_433_ESP-3/RTL_433toMQTT/Nexus-TH/2/23 msg: {"model":"Nexus-TH","id":23,"channel":2,"battery_ok":1,"temperature_C"
:19.7,"humidity":57,"protocol":"Nexus, FreeTec NC-7345, NX-3980, Solight TE82S, TFA 30.3209 temperature/humidity sensor","rssi":-74,"duration":810996}
[2026-05-27 10:26:44] Guru Meditation Error: Core  1 panic'ed (LoadProhibited). Exception was unhandled.
[2026-05-27 10:26:44]
[2026-05-27 10:26:44] Core  1 register dump:
[2026-05-27 10:26:44] PC      : 0x4008ac91  PS      : 0x00060c30  A0      : 0x8008aba1  A1      : 0x3ffebe70
[2026-05-27 10:26:44] A2      : 0x00000000  A3      : 0xfffffffc  A4      : 0x000000ff  A5      : 0x0000ff00
[2026-05-27 10:26:44] A6      : 0x00ff0000  A7      : 0xff000000  A8      : 0x00000000  A9      : 0x3ffebe50
[2026-05-27 10:26:44] A10     : 0x00000003  A11     : 0x00060c23  A12     : 0x00060c20  A13     : 0x00000001
[2026-05-27 10:26:44] A14     : 0x00000004  A15     : 0x3ffb65a0  SAR     : 0x00000020  EXCCAUSE: 0x0000001c
[2026-05-27 10:26:44] EXCVADDR: 0x00000000  LBEG    : 0x4008ac91  LEND    : 0x4008aca1  LCOUNT  : 0xffffffff
[2026-05-27 10:26:44]
[2026-05-27 10:26:44]
[2026-05-27 10:26:44] Backtrace: 0x4008ac8e:0x3ffebe70 0x4008ab9e:0x3ffebe80 0x4008ab8d:0x3ffebea0 0x4010223d:0x3ffebec0 0x40102715:0x3ffebf00 0x40102731:0x3ffebf50 0x4010acee:0x3ffebf80 0x401325fb:0x3ffec030 0x40132fdd:0x3ffec050 0x4013126a:0x3ffec090 0x40100d77:0x3ffec0c0
[2026-05-27 10:26:44]
[2026-05-27 10:26:44]
[2026-05-27 10:26:44]
[2026-05-27 10:26:44]
[2026-05-27 10:26:44] ELF file SHA256: 4c1b5522354afbdb
[2026-05-27 10:26:44]
[2026-05-27 10:26:45] Rebooting...

It continued to crash every hour or two with similar backtraces.

Probably not related but I did observe some sporadic warning of form:

[2026-05-27 11:46:57] N: [ OMG->MQTT ] topic: home3/OMG_lilygo_rtl_433_ESP-3/WebUItoMQTT msg: {"displayMetric":true,"webUISecure":true,"displayQueue":0}
[2026-05-27 11:46:58] rtl_433_ESP(7): Average RSSI Signal -88 dbm, adjusted RSSI Threshold -79, samples 50000
[2026-05-27 11:47:07] bitbuffer_add_bit: Warning: row count limit (50 rows) reached
[2026-05-27 11:47:07] bitbuffer_add_bit: Warning: row count limit (50 rows) reached
[2026-05-27 11:47:07] bitbuffer_add_bit: Warning: row count limit (50 rows) reached
[2026-05-27 11:47:07] bitbuffer_add_bit: Warning: row count limit (50 rows) reached
[2026-05-27 11:47:07] N: [ OMG->MQTT ] topic: home3/OMG_lilygo_rtl_433_ESP-3/RTL_433toMQTT/Nexus-TH/2/23 msg: {"model":"Nexus-TH","id":23,"channel":2,"battery_ok":1,"temperature_C":19.9,"humidity":56,"protocol":"Nexus, FreeTec NC-7345, NX-3980, Solight TE82S, TFA 30.3209 temperature/humidity sensor","rssi":-64,"duration":752996}

Really would like to get this stable so I can upgrade to a recent version...

[NorthernMan54]

Looking at this logically, 2 components have changed since your setup a few years ago, OMG was updated, and I updated RTL_433_ESP. So the issue could be in either component. As the interface with RTL_433_ESP did not change between versions, you should be able to do a custom build to figure out what component broke things.

1 - Your version August 2024 (v1.7.0-166-g4f26d39b) with fixes - working

2 - Your version August 2024 (v1.7.0-166-g4f26d39b) with fixes, pls latest RTL_433_ESP

3 - OMG latest with the RTL_433_ESP from v1.7.0-166-g4f26d39b

4 - OMG latest with latest RTL_433_ESP - broken