R36S Custom Firmware Guide

E07-m1101d Pinout ~upd~ Today

Complete Technical Reference: e07-m1101d Pinout

Power Pins (VCC and GND – Pins 2, 1, 10)

  • VCC (Pin 2): Requires a clean, regulated DC supply between 1.8V and 3.6V. The module draws the most current during transmit (up to 35 mA). Use a 10 µF + 100 nF decoupling capacitor close to this pin.
  • GND (Pin 1, 10): Connect both ground pins to your PCB’s ground plane. A poor ground connection increases noise and reduces range.

Understanding the e07-m1101d Pinout: A Complete Guide to Configuration and Wiring

Mistake 2: Floating RESET Pin

Symptom: Module resets randomly or never initializes.
Fix: Pull RESET to VCC with a 10k resistor (do not short directly to VCC unless your MCU GPIO can drive it low reliably).

Connection Guide to MCU (e.g., STM32, Arduino, ESP32)

  1. Power: Connect VCC to 3.3V and GND to GND.
    • Warning: If using a 5V MCU (like a standard Arduino Uno), you must use a logic level converter or a voltage divider on the RXD pin of the module, though the module itself requires a 3.3V power supply.
  2. Data:
    • Connect Module TXD to MCU RX.
    • Connect Module RXD to MCU TX.
  3. Antenna: Always screw on or solder the antenna before powering the module. Powering the module without an antenna can damage the RF power amplifier.

Pin Description Table

| Pin Number | Pin Name | I/O | Description | Notes | | :--- | :--- | :--- | :--- | :--- | | 1 | VCC | Power | Power Supply Input | Connect to 3.3V. Do not exceed 3.6V. | | 2 | GND | Power | Ground | Connect to system ground. | | 3 | ANT | I/O | Antenna Interface | Connect to a 50Ω antenna. Do not leave floating. | | 4 | GND | Power | Ground | Connect to system ground. | | 5 | TXD | Output | UART Transmit | Connect to MCU RXD. | | 6 | RXD | Input | UART Receive | Connect to MCU TXD. | e07-m1101d pinout

(Note: On some versions of EBYTE modules, Pins 5 and 6 might be labeled as DATA/CLK or DI/DO if they operate in SPI mode. However, the "D" in M1101D usually signifies a built-in MCU for UART serial transmission, making TXD/RXD the correct interface for standard usage.) VCC (Pin 2) : Requires a clean, regulated

5. Antenna Connection – Hidden Pinout Detail

The e07-m1101d is often mistaken for having only 10 pins, but the antenna connection is essentially another “pin” in terms of functionality. Most variants have: Understanding the e07-m1101d Pinout: A Complete Guide to

  • U.FL / IPEX connector: For attaching an external antenna (e.g., a spring antenna or SMA pigtail).
  • Through-hole for wire antenna: Two pads labeled “ANT” and “GND” next to the IPEX connector.

If using a wire antenna, solder a 17.3 cm wire (for 433 MHz) or 8.2 cm wire (for 868/915 MHz) to the ANT pad. Do not connect an antenna directly to any of the numbered pins 1–10.

Common pitfalls

  • Assuming voltage compatibility: confirm whether TX/RX are 3.3V or 5V.
  • Miswiring TX/RX (should be crossed).
  • Not sharing grounds.
  • Expecting all handshake lines to be present—many modules omit them.
  • Relying on silkscreen alone for pin function—consult datasheet or continuity-check pins.

1. Overview of the Module

The e07-m1101d is a compact, low-power RF transceiver module based on the Semtech SX1276 LoRa® chipset. It operates in the 410–525 MHz frequency band (often configured for 433/470 MHz) and is designed for long-range, low-data-rate applications such as IoT sensors, smart metering, and remote controls.

Understanding its pinout is critical for correct integration, as incorrect wiring can damage the module or degrade RF performance.