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E70G Mini DB

Basic Overview #

The E70G Mini DB Is a compact and integrated module designed specifically to be used on products and save a lot of time handling GSM & GNSS power, RF circuits and etc.

Supported Module List #

The pin of this board are standard breadboard bases.

 Feature List #

  • Class 3 (23dBm±2.7dB) for FDD-LTE bands
  • Class 3 (23dBm±2.7dB) for TDD-LTE bands
  • Maximum support CAT1 Bis
  • Support 1.4 ~ 20MHz RF bandwidth
  • FDD: Maximum uplink rate 5Mbps, maximum downlink rate 10Mbps
  • TDD: Maximum uplink rate 2Mbps, maximum downlink rate 8Mbps
  • Support Wi-Fi Scan positioning, share the main antenna
  • TCP/UDP/MQTT/FTP/FTPS/HTTP/HTTPS/LWM2M/Coap
  • For audio use, requires an external codec chip
  • Supports 16-bit linear encoding format
  • Supports short frame mode: the module is only used as a master device

Board Resources #

Function Description #

The detailed assignment of the peripheral interfaces on the Development board is as follows:

Hardware layout of the E70G Mini DB
Hardware layout of the E70G Mini DB
NO. Name Silkscreen Comment
1 Sim card case J1 4FF SIM Card 12.3 × 8 mm
2 External GNSS Antenna GNSS ANT UFL ANTENNA
3 External GSM Antenna GSM ANT Main antenna + Wi-Fi antenna
4 10pin P1-P2 header 2.54mm
5 Jumper USB BOOT Short circuit to program the module
6 USB TYPE-C USB1 USB interface which can be used for debugging and upgrading firmware

The Development board has 2 functional indication LEDs, as follows:

  • D1: NETLIGHT
  • D2: Power indication LED

 Board Interfaces #

The main pin placement of the Development board is shown in the following figure:

E70G Mini DB-Pinout
E70G Mini DB-Pin Mapping
  • E70 Mini DB P1-P2
NO. Name Silkscreen Comment
P1-1 Request to Send RTS Output and input
P1-2 NC NC Not connect
P1-3 RXD RXD Receive data
P1-4 TXD TXD Transmit data
P1-5 DCD DCD Digital output
P1-6 DTR DTR Digital input
P1-7 DBG-TXD DBGTX Transmit data
P1-8 DBG-RXD DBGRX Receive data
P1-9 NC NC Not connect
P1-10 NC NC Not connect
P2-1 Ground GND Ground
P2-2 CTS CTS Clear to send
P2-3 RI RI Ring indication
P2-4 ADC0 ADC General purpose analog to digital converter
Vmax=2.8V, Vmin=0V
P2-5 NC NC Not connect
P2-6 NC NC Not connect
P2-7 NC NC Not connect
P2-8 NC NC Not connect
P2-9 Ground GND Ground
P2-10 Power +5 Main power supply of module
Make sure supply sufficient current in a transmitting burst (typically rises to 1.6A)
Vmin=4.5V, Vmax=5.5V
🔗VRTC Pin Voltage

• Input: VImax = 3.3V, VImin = 1.5V, VInorm = 2.8V
• Output: VOmax = 3V, VOmin = 2V, VOnorm = 2.8V
• IOmax = 2mA
• Iin ≈ 10µA

Board Dimensions #

Dimensions of E70G Mini DB
Board Dimensions
🔗Hint

Make sure the power supply voltage is stable.
The board should power up and turn on automatically without the need for a turn-on function.

FAQ #

What is the E70 Mini DB?

A compact, breadboard-friendly development board for the E70 LTE Cat 1bis module — designed to simplify prototyping of GSM/LTE + Wi-Fi Scan applications with easy access to all module pins.

What network speeds does the E70 support?

• FDD-LTE: up to 10 Mbps DL / 5 Mbps UL
• TDD-LTE: up to 8 Mbps DL / 2 Mbps UL
Supports LTE Cat 1 Bis with 2G fallback capability.

Does it support external antennas?

Yes — two U.FL connectors: one for GSM/Main + Wi-Fi antenna and one for GNSS antenna.

How do I program or debug the module?

Connect via USB Type-C. Short the USB BOOT jumper to enter firmware download mode. The board uses CH343P or similar USB-to-UART converter for easy AT command testing.

What SIM card type does it support?

Standard Nano-SIM (4FF) slot.

What do the LEDs indicate?

• D1 (NETLIGHT): Network status (searching / registered / data activity)
• D2: Power indication

What interfaces are available on the 10-pin headers?

Main UART (TX/RX), Debug UART, RTS/CTS, DTR/DCD, RI, ADC, +5V power, and multiple GND pins.

What is the power supply requirement?

Supply 5V via USB-C or the +5 pin. Peak current during transmission can reach up to 1.6 A. Make sure your power source is stable.

Is audio supported on this board?

The module supports 16-bit linear PCM audio, but requires an external audio codec chip for microphone and speaker functionality.

What is the main use case for this board?

Rapid prototyping of LTE Cat 1bis IoT devices, M2M solutions, asset tracking, and any project requiring reliable 4G connectivity with GNSS and low power consumption.

 

Updated on June 29, 2026

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