Modular clock issue

roadrune wrote: Ok, thanks.

I can see that Ians last login was 5 weeks ago...

To use it as an offline clock, do i need to remove the wifi module?

Well, he owns this site so he has to drop in some time! I do see that he has posted a message on the store site that says he's away on vacation until the 16th of this month though.

As far as what could be wrong, I can give you generalities but I don't have any great specific ideas. General possibilities include...

Corrupt WiFi module firmware - doubtful since the module is still serving web pages.

Hardware failure on WiFi module - maybe but it seems kind of strange that just the I2C interface would fail

One of the surface mount MOSFETS that perform level shifting of I2C signals failed - this is probably the most logical place to look for a failure. If you have a scope you could look at the SDA and SCL lines at the clock's microcontroller and on the WiFi module.

SDA ans SCL pins of clock microcontroller - making good contact in socket? Solder okay? Traces around those pins look okay?


For reference (see also schematic in construction manual)
Clock Microcontroller: SDA is Pin 27 and SCL is Pin 28
ESP=01 WiFi Module: SDA is Pin 5 and SCL is Pin 3


Maybe this will be useful. Or not.

Replacing the WiFi module with no troubleshooting has a 50/50 chance of fixing it. However, if you order a new WiFi module you will need to let Ian know you need Firmware 356. WiFi modules now ship with newer firmware by default, which would be incompatible with your clock.