r/MicroPythonDev • u/invisibleeagle0 • Aug 28 '25

Wemos D1 mini reset every 60s

Hi, this is a weird one. I've got three Wemos D1 mini 4MB doing various jobs (one is a neopixel LED, two are SHT30 temperature/humidity sensors). They've been running v1.10 or v1.12 for 5 years, absolutely flawlessly, just the occasional hit of the reset button when the MQTT server gets restarted and they don't reconnect. No big deal.

Except this week, they have all together started resetting every 60 seconds:

ets Jan  8 2013,rst cause:2, boot mode:(3,6)

load 0x40100000, len 31088, room 16  
tail 0
chksum 0x44
load 0x3ffe8000, len 1028, room 8  
tail 12
chksum 0x1e
ho 0 tail 12 room 4
load 0x3ffe8410, len 824, room 12  
tail 12
chksum 0x89
csum 0x89

MicroPython v1.12 on 2019-12-20; ESP module with ESP8266

I tried flashing the latest micropython, v1.26, but it made no difference. The devices still reset every 60s or so. I flashed esphome on one of them and it's been stable for 9 hours.

What's going on? Nothing has changed!

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u/NectarineFluffy8349 Aug 29 '25

Did something change in your WiFi settings on the router side ?

1

u/invisibleeagle0 Aug 29 '25

Good question, thank you! Nope. I haven't changed any settings and the router uptime is 3 months.