Current Product Don't Have Test Firmware
Note: pls, use PC chrome/edge browser, if can't connect, refresh the webpage.
1. Click connect button
2. After connected successfully, pick a firmware
3. Click the burn button
4. After burning successfully, Unplug the device and restart.
ATOM DTU NB CN
Description
ATOM DTU NB CN is a programmable data transmission unit (DTU) with integrated NB-IoT communication function. The built-in SIM7020C 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 interfaces) for user expansion, 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 CN 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.).
Product Features
SIM7020C/Applicable to China
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:
- I2C x1
- Custom x1
Serial communication: UART 115200bps
Self-contained rail clamping
Cat-NB frequency band:
- B1/B3/B5/B8
Data transmission (kbps):
- 26.15(DL)/62.5(UL)
Network protocol:
- TCP/UDP/LWM2M/COAP/ MQTT/HTTP/HTTPS/ TLS/DTLS/DNS/NTP/ PING/OneNET/Telecom Cloud/Ira Cloud*
Includes
- 1x ATOM LITE
- 1x ATOM DTU NB CN
- 1x SMA antenna
- 1x SMA red cap
- 1x M2 hexagon wrench
- 1x M2x16 screw
- 1x 3.96-4P terminal
- 1x NB-IoT flow card (mobile NB flow: 300M/year, valid time: 2021.06.16-2024.05.31)
Application
- Smart meter
- Remote monitoring
- Shared bicycles
Certification
- RoHS/REACH/CCC/CTA/SRRC/Mobile/Unicom/Telecom/ATEX
Operator certification
- China Telecom/China Unicom/China Mobile
Specifications
| Resources | Parameter |
|---|---|
| Module | SIM7020C |
| Support Cat-NB frequency band | B1/B3/B5/B8 |
| Network protocol | TCP/UDP/LWM2M/COAP/ MQTT/HTTP/HTTPS/ TLS/DTLS/DNS/NTP/ PING/OneNET/Telecom Cloud/Aila Cloud* |
| communication | UART 115200bps |
| Net weight | 32g |
| Gross weight | 40g |
| Product Size | 64 * 24 * 29mm |
| Package Size | 91 * 42 * 24.5mm |
Related Link
- Datasheet
- SIM7020 Series datasheet
- SIM7020 Series_Ayla_Application Note_V1.03
- SIM7020 Series_CTBURST_Application Note_V1.01
- SIM7020 Series_CoAP_Application Note_V1.03
- SIM7020 Series_EAT_Environment & Compilation & Burning Guide_V1.02.
- SIM7020 Series_FOTA_Application_Note_V1.02
- SIM7020 Series_HTTP(S)_Application Note_V1.04
- SIM7020 Series_LWM2M_Application Note_V1.03
- SIM7020 Series_Low Power Mode_Application Note_V1.05
- SIM7020 Series_MQTT(S)_Application Note_V1.05
- SIM7020 Series_NVRAM_Application Note_V1.02
- SIM7020 Series_SAT_Application Note_V1.01
- SIM7020 Series_SNTP_Application Note_V1.03
- SIM7020 Series_TCPIP_Application Note_V1.04
- AT Command
Pin mapping
- SIMCOM7020C
| ATOM | G22(TX) | G19(RX) | 5V | GND |
|---|---|---|---|---|
| SIMCOM7020C | RX | TX | VIN | GND |
- RS485
| ATOM | G23 | G33 | 5V | GND |
|---|---|---|---|---|
| RS485 | TX | RX | VIN | GND |
- I2C
| ATOM | G25 | G21 | 5V | GND |
|---|---|---|---|---|
| I2C | SDA | SCL | VIN | GND |
Schematic
Example
UIFlow
Before using UIFlow programming, you need to burn the UIFlow firmware for the ATOM master, click here to view the quick start tutorial .
Module initialization
Init NB-IoT DTU
- Initialize the DTU device, this operation will initialize the device serial port and RS485 communication interface.
Power down module
- Power down the module
Reset module
- Reset the module, and block the program running until the module reset is complete.
Set command echo mode
- Set command echo, set whether the communication module will reply a repeated command after receiving the command. True/False
Check module status
- Check module status
Check single quality
- Check signal quality
Check network registration
- Check network registration
Check GPRS network registration
- Check GPRS network registration
Enable PDP context
- Enable PDP (Packet Data Protocol)
CoAP
CoAP connect ip port
- Establish CoAP connection
CoAP GET url security
- Use the Get method to make resource requests
CoAP POST url payload content format security
- Use POST method for resource request
CoAP PUT url payload content format security
- Use PUT method for resource request
CoAP destruction
- Release CoAP connection
MQTT
MQTT connect server port client id username password keepalive
- Configure MQTT client information and start the connection.
MQTT disconnect
- Disconnect MQTT connection
MQTT subscribe topic QoS
- Subscribe to the topic and configure the QoS level, return value: True (subscription success)/False (subscription failure)
MQTT subscribe callback topic msg
- Subscription message callback function, when a new subscription message is received, this function will be automatically called and the topic name and data content will be passed
MQTT unsubscribe topic
- Unsubscribe from a topic
MQTT publish topic payload Qos
- Publish subject content and configure QoS level
MQTT check connection
- Check connection status
MQTT poll downlink message
- Statistics downlink information
RS485
RS485 write a line
- Write a row of data to the RS485 bus
RS485 write
- Write data to RS485 bus
RS485 write raw data create list with
- Write raw data in the form of a list, the default input is decimal, if you need to input hexadecimal data, you need to add 0x prefix, such as 0xff.
RS485 read all
- Read all data in the serial port buffer
RS485 read characters
- Read N Byte
RS485 read line
- Read a line of data in the serial port buffer
Remain cache
- Judge whether there is data in the serial port buffer area, the return value is the number of data (Byte).
Modbus RTU
Read coils slave address starting address coil qty
- Read slave coil register data
Read discrete inputs slave address starting address input qty
- Read the discrete input register data of the slave
Read holding registers slave address starting address register qty signed
- Read slave holding register data
Read input registers slave address starting address register qty signed
- Read input register data
Write single coil slave address output address output value
- Write a single coil
Write single register slave address register address register value signed
- Write a single holding register
Write multiple coils slave address starting address output value
- Write multiple coils
Write multiple register slave address starting address register value signed
- Write multiple holding registers
Usage
Connect to the MQTT server to implement message subscription and publishing. When a new subscription message is received, the callback function will be called and the topic name and data content will be passed, and the output result will be printed to the USB serial port.
