SKU:K059
ATOM DTU NB is a programmable data transmission unit (DTU) that integrates NB-IoT communication functions. The built-in SIM7020G module covers most of the Cat-NB frequency bands and integrates the SMA external antenna interface to improve the communication quality and signal stability of the device. Unlike the DTU, which generally only has the function of data transparent transmission, the ATOM DTU series adopts a more open architecture design. The controller ATOM LITE can modify the program at will according to the actual business, and the whole machine reserves a variety of interfaces (RS485, I2C, custom interface) for users to expand, which is convenient for the rapid access of sensors and actuators. The self-contained guide rail clamping structure is perfectly embedded in various industrial control sites. ATOM DTU NB is very suitable for various low-latency, low-throughput application scenarios (such as remote control, asset tracking, remote monitoring, remote medical treatment, shared bicycles, etc.).
SIM7020G/Global version/Multi-band support
RS485 communication interface (with 12V input interface, internal integrated DCDC step-down 5V)
Modbus Master/slave
Strong signal access capability
AT command control
SIM card type: MicroSIM
External antenna: SMA antenna interface
Grove expansion interface:
Serial communication: UART 115200bps
Self-contained rail clamping
Cat-NB frequency band:
Data transmission (kbps):
Network protocol:
Resources | Parameter |
---|---|
Module | SIM7020G |
Support Cat-NB frequency band | B1/B2/B3/B4/B5/B8/ B12/B13/B17/B18/B19/ B20/B25/B26/B28/ B66/B70/B71/B85 |
Network protocol | TCP/UDP/HTTP/HTTPS/ TLS/DTLS/DNS/NTP/ PING/LWM2M/COAP/ MQTT/MQTTS |
communication | UART 115200bps |
Net weight | 32g |
Gross weight | 40g |
Product Size | 64 * 24 * 29mm |
Package Size | 91 * 42 * 24.5mm |
ATOM | G22(TX) | G19(RX) | 5V | GND |
---|---|---|---|---|
SIMCOM7020G | RX | TX | VIN | GND |
ATOM | G23 | G33 | 5V | GND |
---|---|---|---|---|
RS485 | TX | RX | VIN | GND |
ATOM | G25 | G21 | 5V | GND |
---|---|---|---|---|
I2C | SDA | SCL | VIN | GND |
Init NB-IoT DTU
Power down module
Reset module
Set command echo mode
Check module status
Check single quality
Check network registration
Check GPRS network registration
Enable PDP context
CoAP connect ip port
CoAP GET url security
CoAP POST url payload content format security
CoAP PUT url payload content format security
CoAP destruction
MQTT connect server port client id username password keep alive
MQTT disconnect
MQTT subscribe topic QoS
MQTT subscribe callback topic msg
MQTT unsubscribe topic
MQTT publish topic payload Qos
MQTT check connection
MQTT poll downlink message
RS485 write a line
RS485 write
RS485 write raw data create list with
RS485 read all
RS485 read characters
RS485 read line
Remain cache
Read coils slave address starting address coil qty
Read discrete inputs slave address starting address input qty
Read holding registers slave address starting address register qty signed
Read input registers slave address starting address register qty signed
Write single coil slave address output address output value
Write single register slave address register address register value signed
Write multiple coils slave address starting address output value
Write multiple register slave address starting address register value signed