Sonoff Classic - works with USB not 230V

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Teknor
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Joined: 12 Nov 2018, 23:15

Sonoff Classic - works with USB not 230V

#1 Post by Teknor » 23 Apr 2019, 09:52

My Sonoff flashed with ESPEasy connects perfectly with with the WIFI network when powered with USB/GPIO. However, when i connect to 230V not much happens. Any advice where to start troubleshooting?
Raspberry Pi 3 - Domoticz - RFLink 433 - ESP Easy - PikrellCam

bastibasti
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Joined: 31 Jul 2018, 11:41

Re: Sonoff Classic - works with USB not 230V

#2 Post by bastibasti » 23 Apr 2019, 14:53

I noticed a similar case when going from the AT firmware to easyesp. Its a power supply issue. My guess is that during initial wifi setup the easyesp uses more cpu and the system is producing more curent spikes.
try adding a 100µF tantalum cap to the +3.3V

kimot
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Joined: 12 Oct 2017, 20:46

Re: Sonoff Classic - works with USB not 230V

#3 Post by kimot » 23 Apr 2019, 19:09

And what is Sonoff Classic ??
Maybe you connect mains to output, not input.
Bad soldered input terminals.
Measure 3.3V on programming pins with mains connected.
Or if you test with USB on your table and with power line Sonoff laying on floor, it can be issue too.

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