NM-RF-HAT FAQ - Common Questions & Answers

NM-RF-HAT FAQ - Common Questions & Answers

📌 Product Overview

Q1: What is the NM-RF-HAT?
The NM-RF-HAT is a multi-functional Radio Frequency (RF) expansion board specifically designed for the ESP32-2432S028 / NM-CYD-C5, commonly known as the "Cheap Yellow Display" or CYD. It supports Bruce firmware, ESP32Marauder, and other open-source RF projects. By integrating multiple commonly used RF modules onto a single compact PCB, it solves the complex wiring and pin conflict issues commonly encountered in traditional development.

 

Q2: What RF modules does the NM-RF-HAT support?
 Module Frequency / Type Function
Sub-GHz CC1101 (433MHz) Remote control analysis, Sub-GHz analysis and replay
2.4GHz nRF24 Wireless Protocol Analysis
NFC/RFID PN532 Read, Write, Emulation
IR Control IR TX/RX Infrared Signal Capture/Relay
RF433 OOK TX/RX Basic RF Transmission
Power Mgmt USB-C, BAT Charging, On/Off Switch
Expansion GNSS Header GPS/Location Tracking

 

⚙️ Configuration & Usage

Q3: How to set the DIP switch?

The NM-RF-HAT uses a 6-position DIP switch:
  • Position 1 ON: Select CC1101 (433M)
  • Position 2 ON: Select nRF24
  • Position 3 ON: Select PN532 (RFID/NFC)
  • Position 4 ON: Select IR Infrared
  • Position 5 ON: Select RF433 (OOK/ASK)
  • Position 6 ON: Battery power switch
⚠️ Note: Only one function switch ( RF 1-5) can be set to ON at any given time. Multiple modules cannot be active simultaneously.

Q4: How to configure modules with Bruce firmware?
  • CC1101: Set DIP to position 1 → RF → Config → RF Module → CC1101
  • nRF24: Set DIP to position 2 → Select NRF24 functions (Spectrum, Jammer, etc.)
  • PN532 NFC: Set DIP to position 3 → RFID → Config → RFID module → Choose PN532 on I2C
  • RF433 OOK/ASK: Set DIP to position 5 → RF → Config → RF Module → M5 RF433T/R; Return to Config → RF TX Pin → M5 Pin 22; RF RX Pin → M5 Pin 27
  • IR: Set DIP to position 4 → Config → IR TX Pin → Pin 22; IR RX Pin → Pin 27
Q5: How to configure GPS?

Connect the GPS module first, then select GPS (note: default pins for official firmware are RX=22 TX=27, for NM-RF-HAT change to RX=1 TX=3), and choose GPS Tracker or Wardriving function.

🔧 Common Problems & Solutions

Q6: Type-C port won't power on, indicator light stays off?

This is a known issue. Some CYD devices with Type-C interface cannot be powered using USB-C to USB-C cables. 
Solution: Replace with a USB-A to USB-C cable.

Q7: How to identify a CYD with NMMiner Logo?

ESP32-2432S028 purchased from the NMTech website , rockbase.shop or AliExpress Global store all come with the NMMiner Logo and pre-flashed with firmware compatible with the ST7789 driver.

📞 Further Help

  • Bruce Wiki: https://wiki.bruce.computer/
  • NMTech Homepage: https://www.nmminer.com
  • Telegram: https://t.me/NMMiner
  • Reddit: https://www.reddit.com/r/NMTech_Team/
  • Email: support@rockbaseiot.com

 

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