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1. Introduction of BLUE NINA B1 EASY (ATC-E21)
ATC-E21 Easy is a product designed by AT-COM to provide users with integrated facilities that are interconnected into a network through ATCBus.
The NINA-B1 series modules are small stand-alone Bluetooth® low energy modules featuring Bluetooth 5, a powerful Arm® Cortex®-M4 with FPU, and state-of-the-art power performance. The embedded low power crystal in NINA-B1 minimizes power consumption, thus extending the battery life.
2. Schematic
3. Feature of BLUE NINA B1 EASY (ATC-E21)
Module ATC-E21
Some feature of ATC-E21:
- Bluetooth 5.0 band 2.4 GHz 40 channel.
- Support extern Bluetooth antenna.
- Default firmware is u-connect.
- Led RGB displays module status.
- Led displays power status.
- Reset button.
- 5V main power supply.
- Size: 39.5 x 28 mm.
The ATCBus Socket integrate pins allows users to connect to products that supports ATCBus easily. All in one ATCBus.
Power Supply
Module B1 requires a clean and stable power supply. Main supply for ATC-E21 Easy via ATCBus at 2 pins 5V and GND. After that, the power IC TJ62FP30GSF of Tajin will be converted into 3.0V for B1 module. This power ensures up to 250mA response and pressure drop when the load does not exceed 400mV.
Logic level voltage selection
To communicate with external devices with logic 5V/3V, the board has an interface with 3.3V/5V logic voltage selection for user can choose depend their application. When manufacturing, the default logic voltage is 3.3V logic level
ATC-E21 uses bidirectional logic translator TXS0106EPW of Texas Instruments, it can use to convert logic level from 1.2~3.6V to 1.65~5.5V and bidirectional with speed up to 100Mbps. Logic level communicate of B1 is 1.8V and level logic of microcontroller normal is 3.3V/5V, so voltage translator IC need to use to compatible signal level
ATC-E21 supports UART to external device communicate with B1 module via AT command. UART interface supports baud rates from 2400 bps to 115.2 kbps and automatic baud rate detection. The default baud rates is 115200 kbps.
How to change the communication voltage:
- Remove the 0R resistor at the unwanted position.
- Solder the 0R resistor to the desired position of 3.3V or 5V.
Antenna Bluetooth
ATC-E21 supports external Bluetooth antenna when using B111
LED hiển thị
4. . Dimension
5. Video