This is the ESP32 cam that used to various tests, removed from a camera just for tests.
This is the ESP32-WROOM-32U that is intented to be used for my project (due to its external antena + dallas sensors)
This is the board of the sensor where is soldered 47KΩ resistor, activating low power serial mode as per this link
another clear view of the board with hook up cables Yellow=GND, Purple=5V, Green=Tx, Blue=Rx
Version of sensor is AJ-SR04M
This is how powering the boards, Im using this step down board only for the pins, no conversion of voltage. The pair green-brown on the left is 5v and the other pair coming from sensor board. Sensor Green/Tx==>GPIO21, Sensor Blue/Rx==>GPIO22, Ill post all config files on next post.
ESP32 wroom D1 mini in operation
Cables of 5v and sensor to the ESP32 wroom D1 mini
The sensor itself.
Next post my config files