ChipScout

Communication

RA-02H

Ai-Thinker LoRa module used in hobby and sensor-network prototypes.

China-madeAi-ThinkerActiveModerate

Best For

Projects needing LoRa and Sensor network with a commonly available communication part.

Avoid If

You need production-grade certainty without checking the exact module vendor, pinout, and library maintenance status.

Quick Decision Notes

RA-02H is indexed as a communication part from Ai-Thinker. ChipScout tracks it by practical maker-facing dimensions: interfaces, library readiness, estimated price, field-level sources, and whether the page is strong enough for selection rather than only lookup.

Technical Specifications

FunctionLoRa moduleSource: Ai-Thinker
InterfaceSPISource: Ai-Thinker
BandSub-GHz variantsSource: Ai-Thinker
Working Voltage3.3VSource: Ai-Thinker

Common Use Cases

  • Maker prototypes
  • Low-cost modules
  • Educational hardware

Known Issues

  • Breakout boards may use different pin labels or regulator choices
  • Clone modules can differ from the original datasheet part

Interfaces and Library Support

Interfaces
SPI
Wireless
LoRa
Voltage
3.3V
Libraries
Arduino verifiedMicroPython pending
Data Integrity72% confidence
Sourcehttps://docs.ai-thinker.com/
Last verified2026-05-20
Core specsVerified
PinoutAvailable
Library supportChecked
Price rangePresent
Found a wrong spec?

Every field is meant to be source-backed. Corrections should include a datasheet URL, vendor page, module photo, or reproducible library test.

Submit correction

Source Resources

Datasheethttps://docs.ai-thinker.com/Ai-ThinkerLibraryRA-02H Arduino library lookupArduino

Pinout Table

VCC3.3VPower the module from a rail that matches the breakout board, not just the bare IC.
GNDCommon groundConnect ground between the controller, sensor/module, and external power supply.
SCKMCU SPI clockShare with other SPI devices when chip select lines are separate.
MOSIMCU SPI data outRequired for most displays, radios, and writable devices.
MISOMCU SPI data inMay be optional for write-only displays.
CSAny free GPIOUse one chip-select pin per SPI peripheral.

Pinout is not yet source-verified. Use the table as an integration checklist, then confirm exact pins against the module vendor page before wiring hardware.

Common Wiring

VCC

Power the module from a rail that matches the breakout board, not just the bare IC.

GND

Connect ground between the controller, sensor/module, and external power supply.

SCK

Share with other SPI devices when chip select lines are separate.

MOSI

Required for most displays, radios, and writable devices.

Arduino Example

#include <SPI.h>

const int chipSelect = 10;

void setup() {
  Serial.begin(115200);
  pinMode(chipSelect, OUTPUT);
  digitalWrite(chipSelect, HIGH);
  SPI.begin();
  Serial.println("RA-02H SPI wiring smoke test");
}

void loop() {
  // Replace this transaction with the maintained RA-02H driver call.
  digitalWrite(chipSelect, LOW);
  SPI.transfer(0x00);
  digitalWrite(chipSelect, HIGH);
  delay(1000);
}
RA-02H Arduino library lookup

MicroPython Example

MicroPython support is pending. Treat community scripts as prototypes until a maintained driver is linked and tested on a known development board.

Recommended Development Boards

ESP32-C3 development board

Low-cost Wi-Fi/BLE board with enough interfaces for most sensors and modules.

Arduino Uno R4 / compatible

Good baseline for beginner wiring and library validation.

Raspberry Pi Pico W

Practical MicroPython target for I2C, SPI, UART, PWM, and ADC experiments.

Alternative Model Reasons

A7670CCommunicationThis alternative currently has stronger source coverage and confidence in ChipScout.
ATGM336HCommunicationThis alternative currently has stronger source coverage and confidence in ChipScout.
BC26CommunicationCompare this option when price or module availability is the deciding constraint.
CC1101CommunicationThis alternative currently has stronger source coverage and confidence in ChipScout.

Common Questions

What is RA-02H best used for?

Projects needing LoRa and Sensor network with a commonly available communication part.

Does RA-02H support Arduino or MicroPython?

RA-02H has verified Arduino support and MicroPython support pending verification.

What interfaces does RA-02H use?

RA-02H lists SPI; wireless support is LoRa.

Compare RA-02H vs A7670C

Alternatives and Related Parts

A7670C

SIMCom

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ATGM336H

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BC26

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CC1101

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