🔌 HiLetgo CP2102 2pcs: USB to UART TTL Module, Serial Converter for STC, FT232 Replacement Review

UART levels are 3.3V. As mentioned in another review, the micro-B port on one of my boards wasn't exactly soldered but works fine.

Functionally, both CP2102 modules I bought were perfect for my IR receiver project. Unfortunately, the USB socket on one of the boards was soldered at an angle (not flush with the board), which made installation in a custom case difficult. Since I only needed one circuit board, this defect was not decisive, but I doubt the consistency of the processing quality.

Functionally, both CP2102 modules I bought worked great for my IR receiver project. Unfortunately, the USB socket on one of the boards was soldered at an angle (not flush with the board), which made installation in a custom case difficult. Since I only needed one circuit board, this defect was not decisive, but I doubt the consistency of the processing quality.

I bought two packs of HiLetGo CP2102 Micro USB to UART TTL 6 pin modules (4 boards). They have a chip on the board marked "CP2102". A properly working CP2102 chip should supply 3.3V through the internal regulator (there is no jumper on the board to select the voltage). The HiLetGo boards can do serial I/O, but when I checked them with an oscilloscope, I found that the 3V3 pin was 4.5V instead! Similarly, the serial I/O voltage on the TX pin was 4.5V, so connecting this to a Raspberry Pi could…