[richaam]

Hi Adam,

That could be the cause of the constant blue led.
Let's check something else to try to find why those pins aren't at the required level. Can you please do the following procedure:

- Measure voltage on both sides of R8 and R15. It should also be 3.3V
- Check continuity between both sides of R8 and any point with 3.3V
- Voltage at C7

The voltage drop across R8 and R15 was 3.3V (0 volts on the EPS12 side). Voltage at C7 is 3.3V. I don't not have voltmeter cable of checking continuity at the moment. 

-Adam

Hi,

Sorry for my poor English. I doesn't mean voltage drop across the two resistors, but checking voltage on both sides of R8 and R15 against GND.
If voltage at C7 is 3.3V, ignore the continuity check suggested above.
Anyway we are narrowing the possibilities.

Having 3.3V (in relation to GND) on both sides of R8 and R15, then the GPIO0 and CH_PD pins (respectively) of the WiFi module should also be at 3.3V level. If not, later check continuity between R8 and GPIO0, and R15 and CH_PD pins.

Have you tried reheating the welding points of the WiFi module?

No worrys! I did check the voltage of each side against ground. The voltage was 0V for both R8 and R15 on the side feeding into the EPS12 module . I will try reheating the welds. 

Thanks,

Adam