ESP32-PICO-D4 – All ESP32 Module components Inside

ESP32-PICO-D4 – All ESP32 Module components Inside

Recently I got the Esp32-PICO-D4 chip. It is a SIP, all esp32 modules components are included in a single ESP32-PICO-D4 chip.

OK Have look at it.

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https://www.analoglamb.com/product/esp32-wrover/

Buy ESP-WROVER-KIT Now, Please visit AnalogLamb.Com

https://www.analoglamb.com/product/esp-wrover-kit-esp32-wrover-module/

Buy ALB-WROVER Module, Please visit AnalogLamb.Com

https://www.analoglamb.com/product/alb32-wrover-esp32-module-with-64mb-flash-and-32mb-psram/

More ESP32 Module and Boards, Please visit www.analoglamb.com

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ESP32-WROVER Schematic, PCB and Reference Design

ESP32-WROVER Schematic, PCB and Reference Design

Please go here to download ESP32-WROVER Schematic, PCB and Reference Design

https://drive.google.com/open?id=0B7U2LPUrvq9fSHNuQU53a3VDZ3M

Buy ESP32-WROVER Module Now, Please visit AnalogLamb.Com

https://www.analoglamb.com/product/esp32-wrover/

Buy ESP-WROVER-KIT Now, Please visit AnalogLamb.Com

https://www.analoglamb.com/product/esp-wrover-kit-esp32-wrover-module/

Buy ALB-WROVER Module, Please visit AnalogLamb.Com

https://www.analoglamb.com/product/alb32-wrover-esp32-module-with-64mb-flash-and-32mb-psram/

More ESP32 Module and Boards, Please visit www.analoglamb.com

ESP32 Application Note #01 – WiFi Scanner

Welcome to AnalogLamb WordPress Blog. Today I am glad to share ESP32 Application Notes with you. ESP32 is Espressif new product, which has WiFi and Bluetooth. It is very suitable for IoT Applications. We hope you can learn about more details of ESP32 from the series – ESP32 Application Note.

Let us begin ESP32 Application Note #01 – WiFi Scanner.

What is the WiFi Scanner?

It can scan the environment to find out the wifi access points SSID,RSSI and Auth Mode. I believe that every smart phone, notebook computer and PAD have this function. Here is an example as below:

WiFi Scanner

ESP32 WiFi Scanner of XiaoMi

How to Make WiFi Scanner with ESP32?

Event and Event Handler

There is an important concept: event. After completing WiFi Scan, An event – SYSTEM_EVENT_SCAN_DONE  is occurred. Then a callback function will be handled. So we usually declare a function to process all events. For example, esp_err_t event_handler(void *ctx, system_event_t *event). And the function esp_event_loop_init() will add event_handler() to the system.

ESP32 WiFI Operation Mode

ESP32 can either be a station in the network, an access point for other devices or both. Here for WIFI scanner, It is in Station Mode.  Function esp_wifi_set_mode() to set up.

Scanning for Access Points

esp_wifi_scan_start() function will start the work. After completed it, the SYSTEM_EVENT_SCAN_DONE is occurred. Then esp_wifi_scan_get_ap_records() function will get results of a WiFi scan which are stored in ESP32 dynamically allocaed storage.

The Example: Github

ESP32 Wifi Scanner

The result of ESP32 Wifi Scanner

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