Documentation: ESP32 Dev Board NodeMCU WROOM32 WiFi with differently labelled pins

[thorag76]

Hardware

• [ ] ESP8266
• [x] ESP32
• [ ] Raspberry Pi

Modelname: __ Retailer URL: __

nRF24L01+ Module

• [ ] nRF24L01+ you verified this is a Plus model capable of the required 256kBit/s mode
• [ ] square dot indicates original Nordic Semicon chip
• [ ] round dot indicates copy-cat / counterfeit SI labs chip

Can't recognize it on the chip, it's way too small even in a picture of cell phone, but i ordered "NRF24L01+ PLUS - PA LNA SMA Antenne Long Range Funk Modul Raspberry Arduino" in makershop.de together with the " Espressif ESP32 WLAN Dev Kit Board Development Bluetooth Wifi v1 WROOM32 NodeMCU"

Antenna:

• [ ] circuit board
• [x] external antenna

Power Stabilization:

• [ ] 100uF Electrolytic Capacitor connected between +3.3V and GND (Pin 1 & 2) of the NRF Module
• [ ] Voltage stabilizing motherboard

Not using a capacitor and I am not sure if the WROOM32 board has one or does need one.

Connection diagram:

• [ ] Image of the your wiring attached
• [x] this is exactly my problem, none of your images fit

Connection diagram I used:

nRF24L01+ Pin	ESP8266 GPIO
Pin 1 GND [*]	GND
Pin 2 +3.3V	+3.3V
Pin 3 CE	GPIO2 CE D4
Pin 4 CSN	GPIO15 CS D8
Pin 5 SCK	GPIO14 SCLK D5
Pin 6 MOSI	GPIO13 MOSI D7
Pin 7 MISO	GPIO12 MISO D6
Pin 8 IRQ	GPIO0 IRQ D3

nRF24L01+ Pin	ESP32 GPIO
Pin 1 GND [*]	GND
Pin 2 +3.3V	+3.3V
Pin 3 CE	GPIO4 CE D4
Pin 4 CSN	GPIO5 CS D5
Pin 5 SCK	GPIO18 SCLK D18
Pin 6 MOSI	GPIO23 MOSI D23
Pin 7 MISO	GPIO19 MISO D19
Pin 8 IRQ	GPIO0 IRQ D0

Note: [*] GND Pin 1 has a square mark on the nRF24L01+ module

Software

• [ ] AhoyDTU
• [ ] OpenDTU
• [x] not yet started, but I'll start with ahoy

Version / Git SHA:

Version: ..__ Github Hash: ___

Build & Flash Method:

• [ ] Arduino
• [ ] ESP Tools
• [ ] Platform IO

Desktop OS:

• [x] Linux
• [ ] Windows
• [ ] Mac OS

Debugging:

• [ ] USB Serial Log (attached)
• [ ] Setup settings (use our templates ... to be added)
• [x] not yet started

I haven't got that far - not even beyond wiring, the problem is: None of your diagrams fit. My WROOM32 has different labels. They look exactly like those here: https://europe1.discourse-cdn.com/arduino/optimized/4X/8/2/6/8264242978c38d1dcbece30e048f1e16f9bd1554_2_612x500.jpeg The image is taken from https://forum.arduino.cc/t/connecting-2-esp32-wroom-with-nrf24l01-radio-module/1056258

If I compare them to your connection diagram your wroom32 has "G" labels whereas mine has "D" labels and they arrangement is totally different.

I have no idea how to wire the NRF24L01+ with the WROOM32 board and I have no idea what I will have to enter in config files for this

[lumapu]

here are good Diagrams of different ESP32: https://www.studiopieters.nl/esp32-pinout/

You got a 30 pin version of ESP32. You only have to compare the GPIO numbers, eg. GPIO25 is printed on your boards as D25.

[thorag76]

Hey, thanks a lot for your very quick reply and for your help :)

I followed your advice, connected all numbers according to the diagram here in the ahoy project (last diagram).

The only connection I am unable to do is the green one, which connects G16 to the IRQ of the NRF24...

I have no D16. From the page you send me, this should the pin labeled "RX2"

Can I leave it out safely or should I just connect it to RX2 and go with the recommended config settings?

[lumapu]

sure, connect to RX pin and go with the recommend settings

[HorstyS]

funny, i have had exactly same situation here with the same parts. i guessed some links from the diagrams and: it went fine the very first time. :)

[thorag76]

Hey,

thanks a lot for your help - it worked right from the first boot!

Do you still recommend an additional capacitor even if the module with external antenna and the "bigger" ESP32 is used?