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Crash after SAVE with option Send External Voltage/Monitor External Voltage Health #93

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opened 2026-10-05 05:35:36 +02:00 by adam · 9 comments
adam commented 2026-10-05 05:35:36 +02:00
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If I turn on one of these options Send external voltage or Monitor external voltage status with only the microUSB power supply connected and click SAVE the board becomes dead.
The OLED shows the last status, no button response. After unplugging and plugging in the power supply, the OLED no longer shows anything, the board is dead.

LILYGO®TTGO LoRa32 V2.1 _ 1.6 wersja 433Mhz ESP32
https://pl.aliexpress.com/item/32872078587.html?spm=a2g0o.order_list.order_list_main.35.3a541c24j4pvxv&gatewayAdapt=glo2pol

Station:
https://aprs.fi/info/?call=HF5F-2

73!

If I turn on one of these options **Send external voltage** or **Monitor external voltage status** with only the microUSB power supply connected and click **SAVE** the board becomes dead. The OLED shows the last status, no button response. After unplugging and plugging in the power supply, the OLED no longer shows anything, the board is dead. LILYGO®TTGO LoRa32 V2.1 _ 1.6 wersja 433Mhz ESP32 https://pl.aliexpress.com/item/32872078587.html?spm=a2g0o.order_list.order_list_main.35.3a541c24j4pvxv&gatewayAdapt=glo2pol Station: https://aprs.fi/info/?call=HF5F-2 73! <!-- github-sync-id:2373694244 -->
adam closed this issue 2026-10-05 05:35:36 +02:00
adam commented 2026-10-05 05:35:37 +02:00
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With only sending internal battery voltage (and no other switch from Battery Menu activated) it still does not boot?

With only sending internal battery voltage (and no other switch from Battery Menu activated) it still does not boot? <!-- github-comment-id:2190492850 -->
adam commented 2026-10-05 05:35:38 +02:00
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I check one by one - problem after enable Monitor External Voltage Health. Device not booting.

image

Only option Monitor External Voltage Health and crash after SAVE.
image

Without Monitor External Voltage Health everything works fine.
image

I check one by one - problem after enable **Monitor External Voltage Health**. Device not booting. ![image](https://github.com/richonguzman/LoRa_APRS_iGate/assets/161824071/82ef1eb8-aa8a-4875-89b9-1f2df03e2a0b) Only option **Monitor External Voltage Health** and crash after **SAVE**. ![image](https://github.com/richonguzman/LoRa_APRS_iGate/assets/161824071/a9f7e9dc-11db-4db0-b043-7f00fe530193) Without **Monitor External Voltage Health** everything works fine. ![image](https://github.com/richonguzman/LoRa_APRS_iGate/assets/161824071/3cfdea1e-0be3-47c5-a383-9e56f703e856) <!-- github-comment-id:2192910963 -->
adam commented 2026-10-05 05:35:39 +02:00
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did you read the https://github.com/richonguzman/LoRa_APRS_iGate/wiki/02.-WebUI-iGate-Configuration#battery

where it says that when activating external battery readings , if the value is bellow the value in WebUI it will sleep?

did you read the [https://github.com/richonguzman/LoRa_APRS_iGate/wiki/02.-WebUI-iGate-Configuration#battery](url) where it says that when activating external battery readings , if the value is bellow the value in WebUI it will sleep? <!-- github-comment-id:2193276813 -->
adam commented 2026-10-05 05:35:39 +02:00
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Could you help me and show how I can connect divider? I tried to find in the images catalog but found nothing.
I do electronics but with these boards i have no experience and i would not like to make a mistake. Many thanks.

"Send External Voltage from external batteries (Max 15V with predefined 100K+27K Voltage divider)."

After you suggestion I try check this option without external power but can't set 0V (minimal value is 3V).

Could you help me and show how I can connect divider? I tried to find in the images catalog but found nothing. I do electronics but with these boards i have no experience and i would not like to make a mistake. Many thanks. "_Send External Voltage from external batteries (Max 15V with predefined 100K+27K Voltage divider)._" After you suggestion I try check this option without external power but can't set 0V (minimal value is 3V). <!-- github-comment-id:2194296912 -->
adam commented 2026-10-05 05:35:40 +02:00
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clickHere

Vin = 12V battery
R1 = 100K
R2 = 27K
Vout = the ESP32 pin you select to measure the voltage

[clickHere](https://www.allaboutcircuits.com/uploads/thumbnails/voltage-divider-main-circuit.png) Vin = 12V battery R1 = 100K R2 = 27K Vout = the ESP32 pin you select to measure the voltage <!-- github-comment-id:2194338638 -->
adam commented 2026-10-05 05:35:41 +02:00
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I tested. after connecting an external voltage source and saving the Monitor External Voltage Health option the board behaves normally.
image

After disconnecting the external voltage source the board goes to sleep after some time. It can still send information about the lack of voltage.
image

Note that with the external voltage disconnected (only the voltage divider itself) the result is still not 0.00 - perhaps a control for "External Voltage divider Offset" is needed - #129? e.g. +/- 1,00V

After reconnecting the external voltage the board does not start by itself, unless you turn it on using the button (short press). If this was the intention, it is OK. I expected that in standby mode maybe it monitors something and after restoring the voltage it will start by itself ;)

The board during testing I had a micro USB power supply - I did not have a battery but it will come soon.

My parameters.
image

Only I would like to suggest adding a delay of 1min for the activation of the function after restart. This will help unwary users to save themselves without reloading firmware or connecting external voltage, which they may not have immediately prepared.

Other than that, the issue is to close. Thanks

I tested. after connecting an external voltage source and saving the Monitor **External Voltage Health** option the board behaves normally. ![image](https://github.com/richonguzman/LoRa_APRS_iGate/assets/161824071/26b89f9b-dbb2-4b7d-8994-dc1f8cc4df5d) After disconnecting the external voltage source the board goes to sleep after some time. It can still send information about the lack of voltage. ![image](https://github.com/richonguzman/LoRa_APRS_iGate/assets/161824071/76aacca5-758e-419e-8ce9-71fe5f28887f) **Note** that with the external voltage disconnected (only the voltage divider itself) the result is still not 0.00 - perhaps a control for "External Voltage divider Offset" is needed - #129? e.g. +/- 1,00V After reconnecting the external voltage the board does not start by itself, unless you turn it on using the button (short press). If this was the intention, it is OK. I expected that in standby mode maybe it monitors something and after restoring the voltage it will start by itself ;) The board during testing I had a micro USB power supply - I did not have a battery but it will come soon. My parameters. ![image](https://github.com/richonguzman/LoRa_APRS_iGate/assets/161824071/b3151f92-f98c-4886-8d33-a8bcadc89ea5) Only I would like to suggest adding a delay of 1min for the activation of the function after restart. This will help unwary users to save themselves without reloading firmware or connecting external voltage, which they may not have immediately prepared. Other than that, the issue is to close. Thanks <!-- github-comment-id:2202225232 -->
adam commented 2026-10-05 05:35:41 +02:00
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can you explain the last part of the delay you proposed?

as for the Sleep after low external voltage, the board sleeps 30 min and checks again if it was recharged so it should wake up automatic and reconnect (test it ;) )

can you explain the last part of the delay you proposed? as for the Sleep after low external voltage, the board sleeps 30 min and checks again if it was recharged so it should wake up automatic and reconnect (test it ;) ) <!-- github-comment-id:2203166112 -->
adam commented 2026-10-05 05:35:42 +02:00
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  1. If I am a "stupid user" and without external power plugged in I turn on its monitoring and SAVE it will make it impossible to get to the option to return - uncheck this option back easily (http server does not work, because the board is dormant). I can't restart the board with a button. If I unplug and connect the main power supply I think the board at startup checks if the power supply is connected (?) and immediately goes to sleep so I have no way to change that. The only option is to upload a clean firmware and upload the configuration (as I did) or prepare a battery with a divider and plug it in.

So I suggest that the External Voltage Monitoring should be done 1 minute after connecting the power supply, so that the http server starts - which will give me time to quickly disable these options and SAVE again. I hope its clear now - if not - ask me again.

  1. I will test - i need more than 30 min :)
1. If I am a "stupid user" and without external power plugged in I turn on its monitoring and **SAVE** it will make it impossible to get to the option to return - **uncheck this option** back easily (http server does not work, because the board is dormant). I can't restart the board with a button. If I unplug and connect the main power supply I think the board at startup checks if the power supply is connected (?) and immediately goes to sleep so I have no way to change that. The only option is to upload a clean firmware and upload the configuration (as I did) or prepare a battery with a divider and plug it in. So I suggest that the **External Voltage Monitoring** should be done 1 minute after connecting the power supply, so that the http server starts - which will give me time to quickly **disable** these options and **SAVE** again. I hope its clear now - if not - ask me again. 2. I will test - i need more than 30 min :) <!-- github-comment-id:2203374523 -->
adam commented 2026-10-05 05:35:43 +02:00
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warning added to wiki

https://github.com/richonguzman/LoRa_APRS_iGate/wiki/02.-WebUI-iGate-Configuration#battery

warning added to wiki https://github.com/richonguzman/LoRa_APRS_iGate/wiki/02.-WebUI-iGate-Configuration#battery <!-- github-comment-id:2204281796 -->
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Reference: adam/LoRa_APRS_iGate#93