Wifi module - Printable Version

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+--- Thread: Wifi module (/thread-1380.html)

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Wifi module - laulau - 01-05-2018

Hi,
Yesterday afternoon my ESP8266 Wifi module start having prolems:
No more Wifi connection, after having restarted (it lasted abnormally long time), the time was not updated and the display became more and more dark.
I take a look on serial monitor after rebooting and saw the ESP module wasn't able to connect to Wifi.
After more investigation on the RX board i noticed that the ESP module was very hot, the 3.3v regulator also. 
I think the ESP8266 is dead


So I decided to mount the connectors on my spare PCB(V2.0) and reconnect all the needed parts, but at first I had a problem with the display
After looking a little, I noticed a difference on the connector of the display, The LED + pin was moved (toward V1.3 board).

All is working now
 
But now i have to replace the ESP on the V1.3 RX board, and i think it may be difficult to desolder. any advice for that?

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RE: Wifi module - uncle_bob - 01-05-2018

Hi Laurent
I brought a SMD rework station off eBay when I needed to remove mine and it worked a treat. The downside is they cost something like 50 euros. I also seen videos on youtube where people have successfully desolder them using the heat from halogen lamps and even an electric laundry iron.

I'd try giving it a reflow first and if that fails replace it.

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RE: Wifi module - uncle_bob - 01-05-2018

Oh, here's a pertinent video

https://youtu.be/I_dWlk4CSIA

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RE: Wifi module - qldbureau - 01-05-2018

Hi Laurent,

I second uncle_bob's recommendation in using a reflow solder station for doing this. I got one to build my Pro2+ board. It does make adjusting or removing SMD devices, including the WiFi module very easy.

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RE: Wifi module - werk_ag - 01-05-2018

As already said by others, an hot air gun is essential to replace SMD parts in almost any electronic device. A very valuable device for an electronics hobbyist.

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RE: Wifi module - laulau - 06-05-2018

ESP module has been replaced successfully (AMS1117 has also to be replaced).
Some quick test tell me that wifi connection is ok.

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RE: Wifi module - hornychz - 06-05-2018

Congratulations! 

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RE: Wifi module - uncle_bob - 07-05-2018

Great!
What technique did you end up using?

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RE: Wifi module - laulau - 07-05-2018

Where I work there is a little  electronic section, I used a desoldering tweezers because there is no hot air station.

   

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RE: Wifi module - qldbureau - 07-05-2018

(07-05-2018, 09:32)laulau Wrote:  Where I work there is a little  electronic section, I used a desoldering tweezers because there is no hot air station.

That's great, well done! Excellent to hear it is all sorted out.

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