ESP32-NodeMCU pinout not found

Hasan Shadi
Posts: 26
Joined: Tue Mar 31, 2020 7:26 pm

ESP32-NodeMCU pinout not found

Postby Hasan Shadi » Tue May 12, 2020 1:35 pm

I have bought an ESP32-NodeMCU from a store called "SZ Aitexm Store". The store has named it as "NodeMCU", I have searched a lot for a pinout for the NodeMCU, but found nothing. This is the link for the NodeMCU, it is the fourth choice from the left: https://www.aliexpress.com/item/32656775273.html . This is the link for the store that I bought from: https://www.aliexpress.com/store/1095279 .

I have found nothing that refers to the exact same PCB that I have. However, I have been searching for its pinout because I have found some pins that are confusing, for example, the GND pin next to the 5V pin gives 2.2 V nearly, sometimes it differs. And the SD0, SD1, SD2 and SD3, I don't know the use of these 4 pins, along with the "CLK" pin, near the "SD0" pin. I have even found SN and SP pins near to each other, what are these? could someone please explain the pins that I have just mentioned, or at least try to give me a pinout for that PCB. I just feel like the PCB that I have is wrongly designed.
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ESP32-NodeMCU
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MCUism
Posts: 50
Joined: Mon Jul 15, 2019 9:25 am

Re: ESP32-NodeMCU pinout not found

Postby MCUism » Tue May 12, 2020 5:29 pm

Hasan Shadi wrote:
Tue May 12, 2020 1:35 pm
I have bought an ESP32-NodeMCU from a store called "SZ Aitexm Store". The store has named it as "NodeMCU", I have searched a lot for a pinout for the NodeMCU, but found nothing. This is the link for the NodeMCU, it is the fourth choice from the left: https://www.aliexpress.com/item/32656775273.html . This is the link for the store that I bought from: https://www.aliexpress.com/store/1095279 .

I have found nothing that refers to the exact same PCB that I have. However, I have been searching for its pinout because I have found some pins that are confusing, for example, the GND pin next to the 5V pin gives 2.2 V nearly, sometimes it differs. And the SD0, SD1, SD2 and SD3, I don't know the use of these 4 pins, along with the "CLK" pin, near the "SD0" pin. I have even found SN and SP pins near to each other, what are these? could someone please explain the pins that I have just mentioned, or at least try to give me a pinout for that PCB. I just feel like the PCB that I have is wrongly designed.
Hi Hasan,

Firstly, This is not even NodeMCU. It Is ESP32 Wroom Dev Kit C. You can verify this by searching out for the schematics of ESP32 Wroom Dev Kit C I guess SD0 is the I2C line's data line. SN and SP pins are Sensor_N and Sensor_P pins. I am also not sure of their usage but read that they can be used to measure some DC voltages.

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