Hand Soldering an ESP32 Wroom-32 MCU Module to a PCB
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New users who have not done a lot of soldering might find this method of castellated SMD soldering interesting.
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Solder paste is best used for this kind of application.
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For hand soldering, I keep normal soldering iron tip temperature at 350 degrees Celsius.
In this procedure, raise the tip temperature to 400 degrees. -
We first solder each castellation as see in the attached YouTube video.
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After soldering each cove, add a small amount of good quality solder flux paste to the string of pads.
Used here is MG Chemicals 8341
Drag solder all the pads as seen in the video. -
After soldering, using an electric toothbrush, clean the pads with IPA.
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Do a close visual inspection to make sure all connections are quality, see attached images.
