HCM111Z TE-B User Guide

2025-12-05

Introduction

To help you to develop applications with Quectel HCM111Z TE-B conveniently, Quectel supplies corresponding development board HCM111Z TE-B to test the module. This document can help customers quickly understand HCM111Z TE-B interface specifications, RF characteristics,electrical and mechanical details and know how to use it.

Product Overview

HCM111Z TE-B is a Bluetooth development board with Arduino interface, it can be used separately for developing and debugging applications.

Top and Bottom Views

Top View

Bottom View

Component Placement

Component Placement

Component Information:

Component RefDes Description Comment
Power Supply Interfaces J0301 USB power supply interface Typical supply voltage: +5 V
Power Supply Interfaces J0101 External power supply interface Typical supply voltage: +5 V
Power Supply Interfaces J0206 External power supply interface Typical supply voltage: +3.3 V
Power Switch S0101 VBAT on/off switch -
Arduino J0201, J0202, J0203, J0204 Arduino standard interfaces -
USB-to-UART Interface J0202 Connects to the UART interface of HCM111Z via USB-to-UART bridge U0301 -
RF antenna interface J0205 RF SMA connector -
Test Point J0207 Tests the basic functions of the module -
ICs U0101 LDO Convert the voltage from +5 V to +3.3
ICs U0301 USB-to-UART Bridge -
Bluetooth Module U0201 The HCM111Z module -
MIC U0202 Microphone interface -
RESET_N Button SW0201 Resets the module -
Power Indicator D0201 Indicates the power supply on/off status -
Resistor R0202 Tests the power consumption -

Arduino Interface Definition Diagram

Arduino Interface Definition

Key Features

Key Features of TE-B:

Parameters Details
Power Supply USB interface:
  • Supply voltage range: 4.5--5.5 V
  • Typical supply voltage: 5 V
    Arduino interface:
  • Supply voltage range: 1.8--4.3 V
  • Typical supply voltage: 3.3 V
    		•
    Transmitting Power 7.5 dBm ±2 dB
    Temperature Range
  • Operating temperature range: -40 to +85 °C1
  • Storage temperature range: -45 to +95 °C
    		•
    USB-to-UART Interface
  • Used for AT command communication, data transmission and firmware upgrade.
    115200 bps baud rate by default
  • Used for software debugging.
    transmission and firmware upgrade.
    		•
    RESET_N Button Resets the module
    Size (70 ±0.15) mm × (50 ±0.15) mm × (11.79 ±0.2) mm
    Antenna interface 50 Ω characteristic impedance

    Functional Diagram

    Functional Diagram of TE-B

    Application Interfaces

    HCM111Z TE-B can be used alone to upgrade firmware and to debug applications based on HCM111Z TE-B. The following describes the operation procedures of TE-B in different operation modes.

    Operation Procedure with Single Board

    Interface Diagram of Using TE-B Alone

    Interface Diagram of Using TE-B Alone

    Operation Procedures of Using TE-B Alone

    1. Install USB-to-UART driver which can be downloaded from the following link:https://www.ftdichip.cn/Drivers/VCP.htm；
    2. Check the TXD, TXD_M0, RXD and RXD_M0 of the J0201 (Arduino interface) on the TE-B that whether them are connected with a jumper cap or not.
    3. Switch S0101 (power switch) to "ON".
    4. Connect the J0301 (USB power supply interface) with PC via Micro-USB cable. Serial port information will be shown on "Device Manager"of PC. Among them, "USB-Enhanced-SERIAL CH9102 (COM48)"(corresponding to USB Serial Converter A) is connected to the main UART of HCM111Z TE-B, which can be used for AT command transmission,data transmission and firmware upgrade. For details of UART configuration, see document [1].

    USB-to-UART Interface Displayed on PC

    Schematic diagram of AT command and Data Transmission

    Schematic diagram of Firmware Upgrade

    1. Connect the J0201 (Arduino interface) and the relevant functional interface of the user motherboard PCB board for functional debugging. For details of Arduino Interface, see document[2].

    Power Consumption Test Guide

    Test Tools

    The following are the equipment and tools needed for the power consumption test:

    • HCM111Z TE-B
    • DC power analyzer
    • Wire, soldering iron, tin wire, and wire stripping pliers etc. to weld the power supply cord on TE-B.

    This power consumption test guide is based on Keysight's N6705C DC power analyzer for testing.

    Modify TE-B

    If you use the TE-B to test the power consumption of the HCM111Z, you need to modify the TE-B as follows:

    1. Remove R0202 (0 Ω resistor) to connect the USB power supply;
    2. Solder two wires to the two pins of J0206. One wire is used as VBAT(pin 1) and the other is used as GND (pin 2), so that the external power supply can supply power to the module separately.

    Schematic Diagram of TE-B before Modification

    Power Consumption Test Steps

    Please refer to the following steps to test the current consumption of the module on the modified TE-B：

    1. Insert the USB cable.
    2. Set the output voltage on N6705C to 3.3 V, and connect the positive and negative wires of N6705C to the two wires (VBAT, GND) welded on J0206 to supply the module separately.
    3. Turn on the output voltage set by DC power analyzer N6705C, and the module will automatically turn on after powering on.
    4. Conduct power consumption tests in different modes.

    TE-B Wiring Diagram

    Appendix References

    Related Documents:

    Document Name
    [1] Quectel_HCM111Z_AT Command
    [2] Quectel_HCM111Z_Hardware Design

    Terms and AbbreviationsP:

    Abbreviation Description
    DC Direct Current
    GND Ground
    IC Integrated Circuit
    LDO Low-dropout Regulator
    MIC Microphone
    PC Personal Computer
    RF Radio Frequency
    RXD Receive Data
    SMA Sub Miniature Version A
    TXD Transmit Data
    UART Universal Asynchronous Receiver & Transmitter
    USB Universal Serial Bus
    VBAT Voltage at Battery

    1. Within operating temperature range, the module is 3GPP compliant.↩