BW16 KIT with IPEX ODEC 4MB Flash RTL8720DN NodeMCU Serial port to wifi wireless WIFI module BW12 bluetooth module

The characteristics of

Supports 802.11a/b/g/n 1×1, 2.4GHz or 5GHz

Support HT20/HT40 mode

Supports low power beacon listening mode, low power receive mode, low power suspend mode

Built-in AES/DES/SHA hardware engine

Support for TrustZone-M, support for safe startup

Support for SWD debug port access protection and disabling modes

Support for BLE and BT5.0

Bluetooth supports high power mode (7dBm, sharing the same PA as Wi-Fi)

Wi-Fi and BT share the same antenna

Support STA/AP/STA+AP working mode

Simple Config (APP) support Android, IOS one-click network configuration

Support for serial port local upgrade and remote firmware upgrade (FOTA)

• BW16 development board entry use:

I. Overview of BW16

BW16 is a dual-band Wi-Fi+ Bluetooth SoC module developed based on RTL8720DN.BW16 supports dual-band (2.4GHz or 5GHz) WLAN and low-power Bluetooth 5.0;It integrates ARM V8 (Cortex-M4F compatible) high-performance MCU, ARM V8M (Cortex-M0 compatible) low-power MCU, WLAN (802.11a/b/g/n), MAC, Bluetooth baseband and RF baseband, and provides a set of configurable GPIO ports for control of different peripheral devices.BW16 also integrates internal storage, supports simple application development, and can realize full Wi-Fi and BT 5.0 protocol functions.

二.Module/development board wiring
2.1 Module wiring

There are two serial ports in module BW16. One is AT serial port (the default baud rate is 38400), which is used for receiving and receiving AT instructions. The corresponding port numbers are AT_TX and AT_RX.One is the LOG serial port (baud rate 115200), used to print logs and download firmware, for port numbers LOG_TX,LOG_RX.

After getting the module, the first thing is to connect 3.3V,GND,LOG_TX,LOG_RX, and send instructions with LOG serial port ATSC=0 to switch to OTA1 image, otherwise, part of the module AT serial port sends instructions without response.

2.2 Development board wiring

USB interface of development board corresponds to AT serial port of BW16 module.

Log serial port as shown below, used to print LOG, debugging phase recommended to connect out

Ⅲ. Distribution network

BW16 AT serial port default baud rate is 38400, send each instruction with rn end

3.1 Simple Config distribution network

(1). Install SimpleConfigWizard_v115.apk on the mobile phone (the version is older and may be incompatible with the mobile phone system. If you can't use it, please switch to Bluetooth network)

(2). The mobile phone is connected to the WiFi to be equipped with the network

(3) Click to configure the new device

• (4) Select the network to be connected

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(5) Enter the WiFi password and click the link

• (6) Send SIMPLE CONFIG distribution network instruction to BW16 module

• (7) Click to skip on the mobile APP

• (8) At this point, it enters the distribution network process

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• (9) After the success of the distribution network, it is shown as follows

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• 3.2 Bluetooth network matching

  (1) Install Wificonfig_v2.1_20190315. apk on mobile phone

  (2) Send command ATBB=1 to the module to enable Bluetooth network configuration

• (3) Open the APP on the mobile phone and click the magnifying glass to start the network distribution

• (4) If you want to connect to the network the mobile phone is connected to, you can directly enter the password and click Continue. If you want to connect to other AP, you can select Slecet AP to select the network you need to connect to

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  • (5) After successful connection, the APP terminal displays as follows

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  • 3.3 instruction distribution network

    If APP network distribution is not required, WiFi information can be directly sent to the module through AT instruction

     

    1/ ATPW=1 // Set WiFi mode to Station Mode

    2/ [ATPW] OK // Return OK, set successfully

    3/ ATPN=test,12345678 // Send ssid, password to module

    4/ [ATPN] OK // return OK, connection successful

  IV. Connection to TCP Server (Take Anxin Transferable Cloud as an example)

  Click to enter the Essence transparent cloud

  Access to Essence transparent cloud

  1/ ATPC = 0122114 122.174, 35680

  2/ // Create TCP client with server address of 122.114.122.174 and port of 35680 (dynamically assigned)

  3/ [ATPC] OK // Return OK, connection is successful

  4/ // return con_id. Con_id =x (x=[1,9], con_id 0 is reserved)

To send data

1/ ATPT=11,1:Hello World// Sends Hello World to the server with data length 11, con_id 1 (con_id returned at connection time)

Receive data

1/ ATPK=1 // Sets to receive data automatically

2/ [ATPK] OK // return OK, set successfully

TCP data transceiver debugging is as follows

Ⅴ the other

• BW16 development board schematic diagram: