EasyLoader (beta)

Current Product Don't Have Test Firmware

Note: pls, use PC chrome/edge browser, if can't connect, refresh the webpage.

1. Click connect button

2. After connected successfully, pick a firmware

3. Click the burn button

4. After burning successfully, Unplug the device and restart.





UHF-RFID is an ultra-high frequency (UHF) embedded wireless radio frequency reader module. The JRD-4035 module solution with built-in ceramic antenna completely eliminates the technical uncertainty that ordinary UHF modules need to be equipped with additional antennas for users. Optimize the RF design to realize the low power consumption and high performance of the module, and the transmission power of 100mW can reach the effective distance of more than 1.5M. Use serial communication interface, cooperate with built-in encapsulated AT command set, realize plug and play, provide good development and use experience. It is suitable for application scenarios such as warehousing logistics management and smart retail, and meets the application requirements of monitoring and reading multiple product tags.

Product Features

  • Stable recognition distance 1.5m-2m
  • Working spectrum range: 840-960MHz
  • Air interface protocol:
    • EPCglobal UHF Class 1 Gen 2
    • ISO 18000-6C
  • UART communication interface (baud rate: 115200bps)
  • The buffer area can hold up to 200 tags
  • Tag recognition is sensitive and stable


  • 1x UHF-RFID
  • 1x HY2.0 cable (5CM)


  • Warehouse logistics pallet management
  • Vehicle management
  • Smart retail


Specifications Parameters
Air interface protocol EPCglobal UHF Class 1 Gen 2 / ISO 18000-6C
Work area support US, Canada and other regions following U.S.FCC. Europe and other regions following ETSI EN 302 208, Mainland China, Japan, Korea, Malaysia, Taiwan
Working spectrum range 840-960MHz
Output power range 18-26 dBm
Tag cache area 200 tags
Communication protocol UART (Baud rate: 115200bps)
Net weight 41g
Gross weight 58.8g
Product size 56*48*11.5mm
Package size 88*61*21mm
Shell material Plastic (PC )


Pin mapping

When connecting UHF-RFID Unit to PortC, the pin mapping is as follows





//0. Hardware version
BB 00 03 00 01 00 04 7E

//1. Software version
BB 00 03 00 01 01 05 7E

BB 00 03 00 01 02 06 7E

//3. Single polling instruction
BB 00 22 00 00 22 7E

//4. Multiple polling instructions
BB 00 27 00 03 22 27 10 83 7E

//5. Stop multiple polling instructions
BB 00 28 00 00 28 7E

//6. Set the SELECT parameter instruction
BB 00 0C 00 13 01 00 00 00 20 60 00 30 75 1F EB 70 5C 59 04 E3 D5 0D 70 AD 7E

//7. Get the SELECT parameter
BB 00 0B 00 00 0B 7E

//8. Set the SELECT mode
BB 00 12 00 01 01 14 7E

//9. Read label data storage area
BB 00 39 00 09 00 00 FF FF 03 00 00 00 02 45 7E

//10. Write the label data store
BB 00 49 00 0D 00 00 FF FF 03 00 00 00 02 12 34 56 78 6D 7E

//11. Lock the LOCK label data store
BB 00 82 00 07 00 00 FF FF 02 00 80 09 7E,

//12. Inactivate the kill tag
BB 00 65 00 04 00 00 FF FF 67 7E

//13. Set communication baud rate
BB 00 11 00 02 00 C0 D3 7E

//14. Get parameters related to the Query command
BB 00 0D 00 00 0D 7E

//15. Set the Query parameter
BB 00 0E 00 02 10 20 40 7E

//16. Set up work area
BB 00 07 00 01 01 09 7E

//17. Acquire work locations
BB 00 08 00 00 08 7E

//18. Set up working channel
BB 00 AB 00 01 01 AC 7E

//19. Get the working channel
BB 00 AA 00 00 AA 7E

//20. Set to automatic frequency hopping mode
BB 00 AD 00 01 FF AD 7E

//21. Insert the working channel
BB 00 A9 00 06 05 01 02 03 04 05 C3 7E

//22. Acquire transmitting power
BB 00 B7 00 00 B7 7E

//23. Set the transmitting power
BB 00 B6 00 02 07 D0 8F 7E

//24. Set up transmitting continuous carrier
BB 00 B0 00 01 FF B0 7E

//25. Gets the receiving demodulator parameters
BB 00 F1 00 00 F1 7E

//26. Set the receiving demodulator parameters
BB 00 F0 00 04 03 06 01 B0 AE 7E

//27. Test the RF input block signal
BB 00 F2 00 00 F2 7E

//28. Test the RSSI signal at the RF input
BB 00 F3 00 00 F3 7E

//30. Module hibernation
00 BB 00 17 00 00 17 7E

//31. Idle hibernation time of module
BB 00 1D 00 01 02 20 7E

//32. The IDLE mode
BB 00 04 00 03 01 01 03 0C 7E

//33.NXP G2X label supports ReadProtect/Reset ReadProtect command
BB 00 E1 00 05 00 00 FF FF 00 E4 7E

//34. The NXP G2X label supports the CHANGE EAS directive
BB 00 E3 00 05 00 00 FF FF 01 E7 7E

//35. The NXP G2X tag supports the EAS_ALARM directive
BB 00 E4 00 00 E4 7E

//36.NXP G2X label 16bits config-word
BB 00 E0 00 06 00 00 FF FF 00 00 E4 7E

//37.Impinj Monza 4 Qt tags support Qt instructions
BB 00 E5 00 08 00 00 FF FF 01 01 40 00 2D 7E

//38.The BlockPermalock directive permanently locks blocks of a user's Block
BB 00 D3 00 0B 00 00 FF FF 01 03 00 00 01 07 00 E8 7E



Q1: How do I remove the speaker floor noise when the M5Core is on or running?

Execute the following statement in Setup() of the Arduino program

Q2: How does M5Core2 stack modules?

When M5Core2 is stacked with other M5 modules, you need to remove the battery base of Core2, which does not support module stacking.

Q3: A timeout error is displayed when uploading the program to the device

Reason and solution: The power supply current of the port is insufficient, which can cause the device to not enter the download mode normally. You can try to connect a capacitor (>0.1uF) between the RST pin and the GND pin, or when uploading the program, set the G0 Short-circuit to GND, so that G0 can be set to a low level state normally

Q4: How to solve the phenomenon of automatic signal triggering of M5Core button A

Add the header file #include <driver/adc.h> and the function adc_power_acquire(); in the Arduino program

Q5: M5 device battery life

The battery life of the controller is affected by various factors such as battery capacity, operating status, and load, so there is no fixed value. Reducing the load and adopting a sleep strategy can effectively increase the battery life.

Q6: Can multiple modules with batteries be stacked at the same time?

Support multiple stacks, the total capacity of the batteries in parallel increases, and the voltage remains unchanged. However, since the discharge of each battery is not balanced during use, there is a voltage difference between the batteries, which may cause the battery to charge backwards. .(will lose part of the battery capacity)

Q7: M5 master supports WiFi connection to 5G frequency band

ESP32 module currently does not support WiFi in 5G band, only 2.4G.

Q8: The RS485 device cannot communicate normally/data is garbled. Packet loss, etc.

Confirm whether the TX/RX pin on the TTL side of the pin is correct, try to add two 120Ω terminal resistors at the beginning and end of the device line to reduce signal reflection interference

Q9: The difference between different masters and camera products

Click the link below to view the product comparison table

Q10: M5 camera image blur, how to adjust the focal length

Rotate the lens to adjust the focal length within a certain range

Q1: How to read the programmed firmware?

Use esptool to read the flash content of esp32 and export the bin file. Refer to the detailed operation

Q2: Several solutions for esp32 board download failure in Arduino IDE board management

Restart the Arduino IDE, the computer uses the mobile AP mobile network to download.

Method 3: Download the resource package provided by M5Stack for direct installation, and extract the contents to the board management path of Arduino, such as (C:\Users\Sean\AppData\Local\Arduino15\packages), https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/arduino/packages/m5stack_v2.0.0.zip
Q3: Arduino SPIFFS file upload operation

Refer to the Github link below, use arduino-esp32fs-plugin for file upload

Q4: When M5Burner burns firmware, an error pop-up window or exception occurs

Check if the COM of the corresponding device is selected and if the M5Burner is the latest version

Q5: Does the M5 master device support multi-language display (Chinese, English, Japanese, Russian, etc.)?

UIFlow users can switch the Label font to Unicode, Arduino users can use the Chinese font library provided in the M5GFX driver library

Q6: The program cannot load the SD card normally

Confirm whether the SD card format is FAT32, and no partitions exist.

Q7: How to use Bluetooth, HTTP, SD, WebServer, FreeRTOS and other features in Arduino IDE

You can refer to the following link for other ESP32 users to share the case program

Q8: How to download programs for STAMP C3U

STAMP C3U enters program download mode operation: 1. Long press the center button (G9) of STAMP C3U when the power is off. 2. Connect to the computer, after the port is successfully identified, program burning.

Q9: How STAMP C3U defines UART0 output mode

By default, USB CDC is not enabled, the serial port output started by C3U will be output through the default pins (G20, G21) of UART0. If you want to output through USB, please use the IDE to output Its USB CDC option is enabled. (Arduino users can enable it through Tools->USB CDC on Boot-Enabled. For IDF users, please refer to the ESP IDF official documentation.)

Q10: Unable to connect to UIFlow Desktop IDE

Refer to the UIFlow documentation of the corresponding device to check whether the device has entered the USB programming mode.


Q1: Consultation for after-sales problems of products

Describe the problems encountered in detail. Screenshots of the programs involved or files can be added as attachments and sent to M5Stack's official after-sales email

Q2: Code Resources, Cases, User Communication