ESP32

BEMÆRK: Der er fejltryk på AZ-Delivery ESP32 - CMD er påtrykt GND ved 5V power pin.

ESP32 - Hvad kan den?

Espressif ESP32 er en prisbillig dual-core SOC microcontroller med temmelig gode specifikationer:

• Dual-core 32-bit LX6 CPU 160/240 MHz - multitasking
  • Lad core0 afvikler dataopsamling m.m.., mens core1 håndtere wifi/bt/rf kommunikation
• Ultra low power (ULP) co-processor (5μA deep sleep) - ULP
• 520 KB til 8 MB SRAM + 4 til 32 MB Flash med SPIFFS
• Wi-Fi: 802.11 b/g/n - webserver / mesh / RTSP Webcam
• Bluetooth: v4.2 BR/EDR and BLE - BT / BLE MESH
• Priser i april 2019
  • AZDelivery ESP32 512KB RAM / 4MB FLASH:
    • 7,6 EUR / 57kr per stk. ved køb af 5 --- https://www.amazon.de/AZDelivery-NodeMCU-Development-Nachfolgermodell-ESP8266/dp/B074RG86SR/
  • ESP32 512KB/32MB inkl. batteristik + sx1278 RF (max 2,6km) + Antenne + OLED Display
    • 26 EUR / 194kr per stk. --- https://www.amazon.de/Dual-Core-Bluetooth-868-915MHz-Development-Arduino/dp/B078M74NNN/

ESP32 Modeller

Der er flere forskellige ESP32 modeller. Hvis dit projekt kræver ekstern antenne, mere RAM eller lign., være da omhyggelig med at vælge den rigtige ESP32. Læs om modellerne her.

ESP32 Wroom datasheet

ESP32 Wrover datasheet

Getting Started Windows & Arduino IDE

HUSK: Vælg board ESP32 Dev Module og ikke DOIT ESP32 DEVKIT V1.

https://randomnerdtutorials.com/installing-the-esp32-board-in-arduino-ide-windows-instructions/

Getting Started Mac/Linux & Arduino IDE

HUSK: Vælg board ESP32 Dev Module og ikke DOIT ESP32 DEVKIT V1.

https://randomnerdtutorials.com/installing-the-esp32-board-in-arduino-ide-mac-and-linux-instructions/

Vejledninger

• AZ-Delivery Producent Manual (Angiver board som ESP32 Dev Module)
  • https://drive.google.com/file/d/1gK7B-aGiI2ce9HMavQnHuMybUKGDk2DJ/view
• Multitasking
  • https://randomnerdtutorials.com/esp32-dual-core-arduino-ide/
  • https://techtutorialsx.com/2017/05/06/esp32-arduino-creating-a-task/
  • https://techtutorialsx.com/2017/09/13/esp32-arduino-communication-between-tasks-using-freertos-queues/
  • https://techtutorialsx.com/2017/05/16/esp32-dual-core-execution-speedup/
• SPIFFS - SPI Flash File System
  • https://techtutorialsx.com/2018/08/05/esp32-arduino-spiffs-writing-a-file/
  • https://techtutorialsx.com/2018/08/05/esp32-arduino-spiffs-reading-a-file/
  • https://techtutorialsx.com/2019/02/24/esp32-arduino-renaming-a-file-in-the-spiffs-file-system/
  • https://techtutorialsx.com/2019/02/24/esp32-arduino-listing-files-in-a-spiffs-file-system-specific-path/
  • https://randomnerdtutorials.com/esp32-web-server-spiffs-spi-flash-file-system/
  • https://diyprojects.io/esp8266-web-server-part-4-arduinojson-load-save-files-spiffs/ (JSON & SPIFFS på ESP8266)
• Wifi Webserver
  • https://randomnerdtutorials.com/esp32-dht11-dht22-temperature-humidity-web-server-arduino-ide/
  • https://techtutorialsx.com/2019/03/04/esp32-arduino-serving-bootstrap/
  • https://techtutorialsx.com/2018/05/25/esp32-socket-server-controlling-a-relay-remotely/
• Wifi AP og Webserver
  • https://randomnerdtutorials.com/esp32-access-point-ap-web-server/
• Wifi MESH
  • https://blog.hackster.io/the-esp-mesh-development-framework-2d521bfd884
• Wifi RTSP Webcam
  • https://github.com/geeksville/TenDollarWebcam
• Bluetooth
  • https://randomnerdtutorials.com/esp32-bluetooth-low-energy-ble-arduino-ide/
• ULP deep sleep
  • https://codingfield.com/en/2019/01/15/ulp-esp32-un-exemple-simple/
• 2 x I2C Controller
  • https://github.com/espressif/arduino-esp32/issues/977
• ESP32 Timers
  • https://techtutorialsx.com/2017/10/07/esp32-arduino-timer-interrupts/
• Arrays
  • https://techtutorialsx.com/2019/04/13/esp32-arduino-filtering-arrays-with-cpplinq/
  • https://techtutorialsx.com/2018/02/13/esp32-arduino-variable-length-arrays/
• pthreads: Arduino & Threads
  • https://techtutorialsx.com/2017/12/30/esp32-arduino-using-the-pthreads-library/
  • https://techtutorialsx.com/2017/08/20/esp32-arduino-freertos-queues/
  • https://techtutorialsx.com/2017/08/20/esp32-arduino-inserting-in-front-and-back-of-freertos-queues/
• JSON
  • https://techtutorialsx.com/2017/04/26/esp32-parsing-json/
  • https://techtutorialsx.com/2019/05/02/esp32-arduinojson-v6-serializing-json/
• HTTP/2 GET request to Node.js server
  • https://techtutorialsx.com/2019/02/11/esp32-http-2-get-request-to-node-js-server/
• Interrupts
  • https://techtutorialsx.com/2018/07/08/esp32-arduino-pir-motion-sensor-and-interrupts/
• QR code generation
  • https://techtutorialsx.com/2017/12/16/esp32-arduino-ssd1306-oled-drawing-a-qr-code/
• Trace
  • https://techtutorialsx.com/2018/10/11/esp32-esp8266-arduino-debugging-with-the-arduinotrace-library/

Tips & Tricks

1. Ved programmering/upload:
   1. Hold BOOT nede
   2. Tryk en gang på RST mens du holder BOOT nede
   3. Upload nu fra Arduino IDE
2. ESP32 Breadboard hack
   1. Find 2 breadboards hvor +/- rails kan afmonteres på mindst det ene
   2. Afmonter (klip tape) ved +/- rails på det ene eller begge breadboards
   3. ESP32 kan nu monteres mellem de to breadboards
3. SoftwareSerial.h
   1. Findes i Arudino IDE Library Manager som EspSoftwareSerial

Produktlink

https://www.az-delivery.de/products/esp32-developmentboard?ls=en

Pinout diagram

Download i fuld størrelse. BEMÆRK FEJL: CMD er påtrykt GND ved 5V pin

Arduino/ESP32 Reference

Download i fuld størrelse.

Specifikationer fra Wikipedia

• Processors:
  • CPU: Xtensa dual-core (or single-core) 32-bit LX6 microprocessor, operating at 160 or 240 MHz and performing at up to 600 DMIPS
  • Ultra low power (ULP) co-processor
• Memory: 520 KiB SRAM
• Wireless connectivity:
  • Wi-Fi: 802.11 b/g/n
  • Bluetooth: v4.2 BR/EDR and BLE
• Peripheral interfaces:
  • 12-bit SAR ADC up to 18 channels
  • 2 × 8-bit DACs
  • 10 × touch sensors (capacitive sensing GPIOs)
  • 4 × SPI
  • 2 × I²S interfaces
  • 2 × I²C interfaces
  • 3 × UART
  • SD/SDIO/CE-ATA/MMC/eMMC host controller
  • SDIO/SPI slave controller
  • Ethernet MAC interface with dedicated DMA and IEEE 1588 Precision Time Protocol support
  • CAN bus 2.0
  • Infrared remote controller (TX/RX, up to 8 channels)
  • Motor PWM
  • LED PWM (up to 16 channels)
  • Hall effect sensor
  • Ultra low power analog pre-amplifier
• Security:
  • IEEE 802.11 standard security features all supported, including WFA, WPA/WPA2 and WAPI
  • Secure boot
  • Flash encryption
  • 1024-bit OTP, up to 768-bit for customers
  • Cryptographic hardware acceleration: AES, SHA-2, RSA, elliptic curve cryptography (ECC), random number generator (RNG)
• Power management:
  • Internal low-dropout regulator
  • Individual power domain for RTC
  • 5μA deep sleep current
  • Wake up from GPIO interrupt, timer, ADC measurements, capacitive touch sensor interrupt