M5Stack IoT Base with CAT-M Module Communication Base

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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 SIM7080G communication module CatM & NB‑IoT dual‑mode support (global multi‑band) UART interface with AT command control MicroSIM card slot SMA external antenna interface Expansion interfaces: RS485, I2C, GPIO, UART, battery power Supports industrial protocols (ModBus) 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 1 × IoT Base CatM 1 × SMA Antenna 1 × 12 V DC Power Adapter (US standard) 1 × VH‑3.96‑2P Terminal 1 × VH‑3.96‑4P Terminal 1 × DIN‑mount rail base plate 2 × M3×28 screws 1 × M3 hex key Applications Remote control & monitoring Cloud data applications Telemedicine & healthcare IoT Bike sharing systems 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 IoT Base CatM Model Size PDF 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 IoT Base CatM MQTT Example IoT Base CatM Modbus Master Example IoT Base CatM Modbus Slave Example UiFlow1 IoT Base CatM UiFlow1 Docs Protocol SIM7070_SIM7080_SIM7090 Series_AT Command Manual_V1.04 Show more