🌐 IoT Base CatM – Dual‑Mode CatM & NB‑IoT Communication Base
The IoT Base CatM is a functional IoT communication base designed for data transmission scenarios requiring low‑latency, low‑throughput, and long‑term operation. Powered by the SIM7080G communication module, it supports CatM & NB‑IoT dual modes, covering most global frequency bands to meet diverse regional requirements.
With UART AT command control, SMA external antenna, and MicroSIM card slot, the IoT Base CatM ensures reliable connectivity. It integrates rich expansion interfaces (I2C, UART, GPIO, RS485, battery power interface) and supports ModBus industrial protocols, making it ideal for remote control, monitoring, telemedicine, and cloud data applications.
🔧 Features
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✅ SIM7080G communication module
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✅ CatM & NB‑IoT dual‑mode support (global multi‑band)
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✅ UART interface with AT command control
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✅ MicroSIM card slot
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✅ SMA external antenna interface
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✅ Expansion interfaces: RS485, I2C, GPIO, UART, battery power
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✅ Supports industrial protocols (ModBus)
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✅ Certified globally: Softbank, Telec, Docomo, KDDI, RCM, CE‑RED, GCF, FCC, PTCRB, AT&T, Verizon, T‑Mobile, US Cellular, Deutsche Telekom, RoHS, REACH
📦 Package Contents
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1 × IoT Base CatM
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1 × SMA Antenna
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1 × 12 V DC Power Adapter (US standard)
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1 × VH‑3.96‑2P Terminal
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1 × VH‑3.96‑4P Terminal
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1 × DIN‑mount rail base plate
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2 × M3×28 screws
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1 × M3 hex key
🔧 Applications
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📡 Remote control & monitoring
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☁️ Cloud data applications
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🩺 Telemedicine & healthcare IoT
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🚲 Bike sharing systems
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📊 Data acquisition & industrial IoT
📊 Technical Specifications
| Specification | Parameters |
|---|---|
| Communication Module | SIM7080G (UART 115200 8N1) |
| Supported Cat‑M Bands | B1/B2/B3/B4/B5/B8/B12/B13/B14/B18/B19/B20/B25/B26/B27/B28/B66/B85 |
| Supported Cat‑NB Bands | B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/B20/B25/B26/B28/B66/B71/B85 |
| Cat‑M Speed | UL: 1119 kbps / DL: 589 kbps |
| NB‑IoT Speed | UL: 150 kbps / DL: 136 kbps |
| RF Power Class | Class 5 (Typ. 21 dBm) |
| Protocols Supported | TCP, UDP, HTTP, HTTPS, TLS, DTLS, PING, LWM2M, COAP, MQTT, SSL |
| Operating Current | 42 mA (DC 12 V input, connected) |
| Interfaces | I2C, GPIO, UART (HY2.0‑4P), RS485 (VH‑3.96‑4P), DC power, lithium battery |
| Product Size | 80 × 54 × 33 mm |
| Product Weight | 29.4 g |
| Package Size | 104 × 99 × 60 mm |
| Gross Weight | 153.6 g |
Certifications
- SIM7080G_AT&T_Certificate_2020
- SIM7080G_GCF_Certificate_2020
- SIM7080G_NCC_2020
- SIM7080G_PTCRB_Certificate_2020
- SIM7080G_RCM_Compliance Certificate_2020
- SIM7080G_T-mobile_Certificate_2021
- SIM7080G_US Cellular_Certificate_2021
Schematics
PinMap
- SIM7080G
| M5Core | G0 | G35 | G12 | 5V | GND |
|---|---|---|---|---|---|
| SIM7080G | RX | TX | PWR | VCC | GND |
- RS485
| CORE | G15 | G13 | 5V | GND |
|---|---|---|---|---|
| RS485 | TX | RX | VIN | GND |
- HY2.0-4P
| M5Core | G21 | G22 | 5V | GND |
|---|---|---|---|---|
| I2C PORT | SDA | SCL | VCC | GND |
| M5Core | G36 | G26 | 5V | GND |
|---|---|---|---|---|
| GPIO PORT | ADC | DAC | VCC | GND |
| M5Core | G17 | G16 | 5V | GND |
|---|---|---|---|---|
| UART PORT | TX | RX | VCC | GND |
M5-Bus
| PIN | LEFT | RIGHT | PIN |
|---|---|---|---|
| GND | 1 | 2 | SIM7080G_TX |
| GND | 3 | 4 | PORT.B |
| GND | 5 | 6 | NC |
| NC | 7 | 8 | NC |
| NC | 9 | 10 | PORT.B |
| NC | 11 | 12 | NC |
| NC | 13 | 14 | NC |
| UART_RX | 15 | 16 | UART_TX |
| I2C_SDA | 17 | 18 | I2C_SCL |
| NC | 19 | 20 | NC |
| MOD PWR | 21 | 22 | RS485_TX |
| RS485_RX | 23 | 24 | SIM7080_RX |
| NC | 25 | 26 | NC |
| NC | 27 | 28 | 5V |
| NC | 29 | 30 | BAT |
Model Size
Datasheets
- SIM7070_SIM7080_SIM7090 Series_CTBURST_Application Note_V1.02
- SIM7070_SIM7080_SIM7090 Series_CoAP(S)_Application Note_V1.03
- SIM7070_SIM7080_SIM7090 Series_Email_Application Note_V1.02
- SIM7070_SIM7080_SIM7090 Series_FOTA_Application Note_V1.02
- SIM7070_SIM7080_SIM7090 Series_FS_Application Note_V1.02
- SIM7070_SIM7080_SIM7090 Series_FTP(S)_Application Note_V1.02
- SIM7070_SIM7080_SIM7090 Series_GNSS_Application Note_V1.02
- SIM7070_SIM7080_SIM7090 Series_HTTP(S)_Application Note_V1.02
- SIM7070_SIM7080_SIM7090 Series_Linux_Application Note_V1.02
- SIM7070_SIM7080_SIM7090 Series_Low Power Mode_Application Note_V1.02
- SIM7070_SIM7080_SIM7090 Series_LwM2M_Application Note_V1.02
- SIM7070_SIM7080_SIM7090 Series_MQTT(S)_Application Note_V1.03
- SIM7070_SIM7080_SIM7090 Series_PING_Application Note_V1.02
- SIM7070_SIM7080_SIM7090 Series_SAT_Application Note_V1.02
- SIM7070_SIM7080_SIM7090 Series_SSL_Application Note_V1.00
- SIM7070_SIM7080_SIM7090 Series_TCPUDP(S)_Application Note_V1.03
- SIM7080_Series_SPEC_20200427
Softwares
Arduino
UiFlow1