opencoil-paracity: code

Description of Files

otastaImg - Offline ESP8266 webserver + captive portal + filesystem (iOS only atm)
otastaImg-close-button - The above, but with 'close' button, just like your Hotel/Train/Airport wifi ;) (iOS only atm)
paracity_gallery_v041 - Offline ESP8266 webserver + captive portal + filesystem hosting relevant files to reproduce all of this hardware and software (BROKEN)

Prerequisites

This guide assumes you have a 4MB ESP12F microcontroller and use Arduino IDE.

Hardware:

Micro USB cable WITH DATA LINES (not only power/charging)
The ESP12F we are using dont have a USB interface so we flash them using a programming jig or 'ESP8266 Programmer Socket Adapter'. These use CP210x drivers. Depending on your operating system you might need to install them. On linux these are already present.

Software:

Board Manager: You will need to add the support for this board to your IDE (Arduino in this case), see: https://github.com/esp8266/Arduino
SPIFFS: You will need to add SPIFFS file upload support to Arduino if you want to upload files to the ESP12F, see: https://github.com/esp8266/arduino-esp8266fs-plugin

Uploading Data to SPIFFS

The website served on the ESP8266 lives in the 'data' folder inside the sketchyour sketch. To upload this data you need the 'Arduino ESP8266 filesystem uploader' plugin. Find it here. You will find the tool/function in Arduino > Tools > ESP8266 Sketch Data Upload (make sure the directory path is correct). Close the Serial Monitor prior to uploading data.

Uploading Code

For ESP12F use the following settings in Arduino IDE

Board: Generic ESP8266 Module
Builtin Led: 2
Upload Speed: 921600
CPU Frequency: 80 MHz
Crystal Frequency: 26MHz
Flash Size: 4MB (FS:3MB OTA: ~512KB)
Flash Mode: DOUT
Flash Frequency: 40MHz
Reset Method: dtr (aka nodemcu)
Debug port: Disabled
Debug Level: none
LwIP Variant: v2 Lower Memory
VTables: Flash
Exceptions: Legacy (new can return nullptr)
Erase Flash: depends on if you want to change SSID, Files, or only Sketch
Espressif FW: nonos-sdk 2.2.1+100 (190703)
SSL Support: All SSL ciphers (most compatible)
Port: depend if u are uploading Over The Air, or using a cable
Programmer: AVRISP mkII

These settings give you about 2.471 KB of SPIFFS storage space for files and ~512KB sketch size

Over The Air (OTA) Uploading

Connect to the hotspot created by the ESP12F.
Launch Arduino, choose "esp at 192.168.4.1" as the port.
If you don't see the port listed in Arduino (Tools > Port), restart Arduino IDE.

You can upload your sketch and files wirelessly, there is one caveat: SPIFFS file uploads don't work with password protected uploads (line 42). Workaround: flash your sketch with line 42 commented out. Upload your files to SPIFFS, then uncomment the line and Upload the code.

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