How_to_Use.md

How to Use Snap Air Unit

This is education version of Snap Air Unit, which is designed for youth (kids and adult) to get a basic understanding of auto pilot. And we hope it wil inspire people from knowing more about automation, physics, electronics， mathematics, computer, aviation, and etc. Ultimately, it might cultivate talents from generation to generation in scientific aeras.

** Note: MSP(DJI) Protocol is NOT used, since there is NO camera on education version hardware of Snap Air Unit.**

Tools for test

Snap Air Unit Test

Please consult: Snap Air Unit Test

SPP BT Virtual COM

101 lessons on How to use Snap Air Unit Module

Step 1: Preparation of hardware and firmware

Please consult:

1. Build_and_Flash.md
2. How_to_Connect.md

Step 2: Software mode switching

Mode LED

1. [Mandatory] WiFi-AP mode: Always bright
2. [Mandatory] WiFi-STA mode: Slow flash
3. [Mandatory] BT-SPP mode: flash

Status LED

1. [Mandatory] Time out for Connection with Factory mode: Quick flash
2. [Mandatory] Wait for Binding: Two flash
3. [Mandatory] Wait for Connection: Slow flash
4. [Mandatory] Connection Established: Always bright
5. [Mandatory] Exception or Error: Three flash

2.1 by hardware

Short press to switch mode

sequecne：WiFi-STA ==> BT-SPP(UART) ==> WiFi-AP ==> Loop

Note: Currently is for devlopement choices; please re-order to AP->STA->BT when release.

2.2 by udp command

bluetooth

Switch to BT SPP(UART) mode

ap

Switch to WiFi STA mode with ssid and password

wifi

Switch to WiFi AP mode with ssid and password

Note: Currently, different mode switch is deemed effective way. Please switch to BT first and back to WiFi AP or STA mode.

2.3 by debug command

bluetooth

Switch to BT SPP(UART) mode

ap

Switch to WiFi STA mode with ssid and password

wifi

Switch to WiFi AP mode with ssid and password

Note: Currently, different mode switch is deemed effective way. Please switch to BT first and back to WiFi AP or STA mode.

Step 3: Configure BT SPP(UART) on windows

please consult: 蓝牙无线自制串口模块连接穿越机配置工具

Step 4: Find WiFi Address of the module

Currently, we do NOT support Need Bonjour, broadcast, UPNP protocol for device finding when in STA/Ap mode.

So......

a) It's easy for us to get WiFi address when in AP mode.

b) For WiFi STA mode, please check seiral debug log, something much more like below bold ip address

I (1912) wifi:connected with AutoLab, aid = 13, channel 6, 40D, bssid = d0:c7:c0:5c:ce:50

I (1912) wifi:security: WPA2-PSK, phy: bgn, rssi: -37

I (1922) wifi:pm start, type: 1

I (1952) wifi:AP's beacon interval = 102400 us, DTIM period = 1

W (2482) sta: UNEXPECTED EVENT 00000000

I (2482) sta: Rechecking in 9 seconds...

I (3502) esp_netif_handlers: sta ip: 192.168.78.229, mask: 255.255.255.0, gw: 192.168.78.1

I (3502) sta: got ip:192.168.78.229

I (3502) sta: connected to ap SSID:AutoLab password:68686868

I (3512) http: Starting HTTP Server

Step 5: Communicate with Snap Air Unit with iNav configurator

5.1 MSP Port Pre-configured throught USB

Please check which UART port is connect on FC, and enable it as MSP port ahead. Now we are using UART2, connecting Snap Air Unit

5.2 BT by virtual com port

please consult: 蓝牙无线自制串口模块连接穿越机配置工具

5.3 WiFi by UDP port(8889)

WiFi STA, Please check IP of your Snap Air Unit

WiFi AP, default IP 192.168.4.1

Step 6: Communicate with Snap Air Unit with UDP tools

Step 7: Communicate with Snap Air Unit with debug serial port

Step 8: Scratch Programming

TBD