added instructions for firmware flashing

code/esp8266/README.md

@@ -0,0 +1,27 @@
+# opencoil-paracity
+
+### 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 SPIFSS storage space for files and ~512KB sketch size