====== ESP32 ======

===== ESP32 Datasheet =====

  * https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf


===== ESP32 Projects and Applications =====

==== Low Power ====

  * https://randomnerdtutorials.com/power-esp32-esp8266-solar-panels-battery-level-monitoring/
  * https://lastminuteengineers.com/esp32-sleep-modes-power-consumption/
  * https://www.instructables.com/id/ESP32-Deep-Sleep-Tutorial/

==== Other ====

  * https://randomnerdtutorials.com/learn-esp32-with-arduino-ide/


==== DHT22 ====

  * :!: Tutorial: https://techtutorialsx.com/2018/04/18/esp32-arduino-getting-temperature-from-a-dht22-sensor/
  * Library: https://github.com/beegee-tokyo/DHTesp

  * https://randomnerdtutorials.com/esp32-dht11-dht22-temperature-humidity-web-server-arduino-ide/
  * https://github.com/RuiSantosdotme/Random-Nerd-Tutorials/blob/master/Projects/ESP32/dht22_web_server.ino


===== LoRaWAN (TTN) with ESP32 =====

  * Tutorial: https://www.thethingsnetwork.org/labs/story/heltec-lorawan-gps-quick-start

==== LMiC Documentation ====

  * https://github.com/mcci-catena/ibm-lmic/blob/master/doc/LMiC-v1.6.pdf


===== Heltec WIFI LoRa 32 (ESP32, SX127X, OLED) =====

https://heltec.org/project/wifi-lora-32/?lang=en

{{https://heltec.org/wp-content/uploads/2018/04/P1010696_1.png?400}}


==== Schematic: heltec ESP32, LoRa 868 MHz ====

  * {{https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series/raw/master/SchematicDiagram/WIFI_LoRa_32(V1)/WIFI_LoRa_32(868-915version)Schematic_diagram.PDF}}

==== Pinout ====

  * V1: [[https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series/raw/master/PinoutDiagram/WIFI%20LoRa%2032%20.pdf]]
  * V2: [[https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series/raw/master/PinoutDiagram/WIFI%20LoRa%2032(V2)%20.pdf]]


==== Important Sources ====

  * http://www.heltec.cn/project/wifi-lora-32/?lang=en
  * https://www.instructables.com/id/ESP32-Lora-Changing-Frequency/
  * https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series/tree/master/esp32/libraries/LoRa
  * https://github.com/HelTecAutomation/heltec_lmic
  * :!: https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series
  * https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series/blob/master/README.md#instructions
  * https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series/blob/master/InstallGuide/windows.md
  * http://heltec.diytrade.com/sdp/2044581/4/pl-6785993/0.html
  * https://hackaday.io/project/27791/logs
  * https://hackaday.io/project/27791-esp32-lora-oled-module
  * https://www.hackerspace-ffm.de/wiki/index.php?title=Heltec_Wifi_LoRa_32
  * https://www.hackster.io/rayburne/lora-and-the-esp32-6ce9ba

===== BLE =====

  * What are GAP, GATT, Server, Client, Master, Slave in BLE? \\ https://devzone.nordicsemi.com/f/nordic-q-a/71/what-is-a-client-and-server-in-ble


===== Alternatives =====

  * [[https://www.banggood.com/2Pcs-Wemos-TTGO-LORA32-868915Mhz-ESP32-LoRa-OLED-0_96-Inch-Blue-Display-p-1239769.html|TTGO]]
  * TTGO and Heltec comparison: https://www.youtube.com/watch?v=CJNq2I_PDHQ

Seems to be technically completely identical.

===== TTGO T-Beam: ESP32 + LoRa + GPS =====

  * https://github.com/LilyGO/TTGO-T-Beam
  * https://blog.hackster.io/the-ttgo-t-beam-an-esp32-lora-board-d44b08f18628
  * https://www.youtube.com/watch?v=fK4YQROD9Ps