Hi everyone, I'm new to arduino and microcontrollers, last month, i bought an esp32-cam. But today, i powered it with an 9v battery and the flash LED turned on and off rapidly, I plug the battery out instantly. Now when I upload code that uses PSRAM and camera it just doesnt't work, only codes dont use camera and psram work. Please help. Btw, I'm new so i dont know what catergories to chose.
1. This is the ESP32-CAM Module that you have -- correct?
Figure-1:
2. Between which two-pin you have connected the 9V Battery?
3. Which one of the following adapters you are using to upload sketch in the CAM Module?
Figgure-2:
Figure-3:
Figure-4:
4. From net:
The ESP32-CAM module is typically designed to operate with a 5V power supply. You can connect a 5V voltage source to the 5V pin on the module, and it should work within this voltage range.
However, you should not exceed this voltage, as doing so can damage the module. The ESP32-CAM module is not designed to handle higher voltages, and applying a voltage greater than 5V can lead to permanent damage.
5. The condition of your CAM Module can only be known by uplaoding a simple blinking sketch using the ESP32-CAM-MB adapter Module (Fig-4 of Step-3). The other two adapters did not work for me.
Sadly, the destruction happens almost instantaneously. The ESP32-CAM is cheap, so treat this as a learning experience. With microprocessors, the rules about voltage and current absolutely must be understood and very carefully followed.
I found this tutorial to be very helpful in getting started: https://dronebotworkshop.com/esp32-cam-intro/
You can buy the cameras seperatly, get get hold of one and see if it works in your ESP32CAM.
Why should ESP32-CAM fail if 9V is connected at 5V-pin?
1. This is the regulator circuit (5V/3.3V, Fig-1) of ESP2-CAM Module.
Figure-1:
2. This is the specifications (Fig-2) of AMS1117 voltage reagulator from data sheets:
Figure-2:
3. When the allowable voltage (maximum rating) at the input of the AMS1117 regulator is 15V, should it fail at 9V? Or the particular regulator of this CAM board is bad that it has passed the whole voltage (9V) at the ouput instead of 3.3V, which has caused the flash LED and electronics of the CAM Module to get fried?
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The OP has not stated how they connected the power source.
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- Yes.
- I connected positive to VCC pin and negative to GND pin.
3.Figure-4.
4.Thanks for explaining. - I uploaded some bluetooth to control leds on all gpios, it all works fine but i haven't tested with BLE.
I used my multimeter to see what is the VCC pin shorted to, i thought it just go through the ams1117 and then go to the circut but no, the VCC pin shorted to many places but not through ams1117 like the psram, camera holder. Maybe that's the reason why sketches about psram and camera does not working.
There is no VCC-pin in the ESP32-CAM Module. Thre is a 5V-pin. There are two GND-pins. The GND-pin near 5V is the genuine GND; the other GND-pin is fake (at least in my CAM).
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It's between GND and GPIO3. And you are right, the GND next to GPIO1 comes with a ~300 ohm with the other GND. Guess i only can use it with bluetooth and wifi projects.
Referring to ESP32-CAM Module's Camera Side:
GND-pin between 5V and IO12 is the genuine GND.
GND pin near UOT-pin is a fake GND.
Is your ESP32-CAM fried or still functional?
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Still functional without using psram and camera. Im haven't tested GPIO0 because some people said that GPIO is related to code uploading process.
How do you know Cameara and PSRAM are not working? Did you try this tutorial (video streaming)?
It always shows that psram: PSRAM ID read error: 0xffffffff and Camera probe failed with error 0x105, i tested with video streaming and a sketch that takes photo and save to sd card, i tried to disconnect and reconnect the camera but always get this error.
As a par of trouble shooting session, perhaps, you need another CAM Module to test.
Could you provide me an code for testing?
You can follow the tutorial mentioned in post #15 for video streaming.
ur code works but the video steaming does not working
If you like, you can have another ESP32-CAM Module and figure out which component is faulty -- ESP32 or Camera?
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