As an Arduino learning tool and alfa proto I am using a Chinese board ESP32 devkit v1.0 . My first sketch works ok and I am starting to add more functionality using Arduino IDE. What I am curious about is the following: if for final product I design my own pcb and use ESP-WROOM 32 modules (not d…

Will you be soldering the ESP32 controller onto the PCB.

That is the plan. Did you include RC reset circuit in your design or it is inside the ESP32 module?

That is the plan. Have you any experience in soldering .05” castellated chips ? Did you include RC reset circuit in your design ? Yes. 5v——[10k]——[Reset pin]—.—[100nF]——GND ‘——[Switch]——GND

Once I tried to program ESP32-CAM Module with the CH340G based USB/TTL adapter; but, I was not successful. Then I had to use CH340G based ESP32-CAM-MB Adapter from which I have copied Fig-2 of post #3. Look at the DTR and RTS signals which are not active in your cable.

The following setup (Fig-1) of this link nver worked for me to program ESP32-CAM Board (the black GND line was connected to the real GND line near 5V-point). Anyway, I have to finish the programming task using ESP32-CAM-MB CH340G based adapter (Fig-2). [FTDIAdapter] Figure-1: [image] [ESP32-CA…

This is the schematic of the programmer in post #13. [2023-10-21_22-40-59] Press and hold Reset. Close S1 (Boot). Release Reset. Open S1 (Boot). The ESP32 is now placed in the programming mode waiting for new compiled code. Uploading a sketch from the Arduino IDE starts the ESP32 to store the co…

In the schematic of post #15, the Reset Button and the Reset signal to the MCU are missing. The pin marked as GND at the right-bottom of CAM Board is a false inscription; it is not a real ground; rather it is connected with EN-pin (Pin-3 of ESP-WROOM-32 MOdule), which is connected with CHIP_PU-pin …

[image] GolamMostafa: The pin marked as GND at the right-bottom of CAM Board is a false inscription; it is not a real ground; rather it is connected with EN-pin (Pin-3 of ESP-WROOM-32 MOdule), which is connected with CHIP_PU-pin (Pin-9 of ESP32 MCU). That is true for some ESP32CAMs, but not a…

ESP32 WROOM part programming

Projects General Guidance

LarryD October 22, 2023, 4:14am 13

The board in post #5 above works first time every time with an FTDI 5V/3V3 module.

Also the ESP32Cam boards work wth the same FTDI module as well if the process in post #2 is followed.

See this post for further information:

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ESP32 WROOM part programming

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