aa30zero-wifi

HF antenna analyzer using Rigexpert AA-30.ZERO and esp8266 nodemcu

WORK IN PROGRESS

Goal

Create a battery powered portable device with which you can make measurements. Measurements can be downloaded via WIFI and replayed to Antscope or converted to csv.

user interface

2 RGB leds and 2 buttons:

• WIFI button, WIFI LED
• Measuement button, Measurement LED

WIFI

Short press the WIFI button to connect or disconnect from WIFI. Long press the WIFI button to enter WIFI end-user-setup.

WIFI LED indicates status:

• blinking blue: connecting to an AP (a wifi network)
• blue: connected to an AP
• red: failed to connect to an AP
• yellow: in end user setup (see https://nodemcu.readthedocs.io/en/latest/en/modules/enduser-setup/ )
• magenta: error in end user setup

measurement

Short press the Measurement button to start a measurement. Measurements are saved on the NodeMCU flash (spiffs).

Measurement LED indicates status:

• flashing between off/blue/green/cyan - measurement in progress. Blue is blinking, green is toggling each time a line is received from AA-30.Zero
• red: error happened
• green: a measurement finished successfully

Measurements are saved as m/aa-0.txt The number is inceremented for each new mesurement (actually it finds the first non-existent filename)

Current state

working:

• button handling :) deoupling, long/short detection
• wifi end user setup
• connecting to wifi
• there is a "telnet server" to access the Lua interpreter, but stderr can not be redirected with current nodemcu-firmware so this is mosly useless
• prefedined measurement: center frequency 15Mhz, range 30Mhz, 1001 points
• LEDs for all of the above
• AA-30.Zero communication timeout
• working breadboard prototype

TODO

• file I/O error handling
• telnet-AA30 uart proxy
• webserver
  • list of measurement
  • download a measurement
  • delete a measurement
  • dleete all measurements
  • measurement config
• replay measurement with socat to Antscope running with wine
• script to convert measurement to csv
• schematic
• notes about schematic, pin usage, warning about SD_D2
• clarify end user setup in README
• battery power
• box
• use sntp and use datetime for naming measurement files if available at time of measurement start
• reset button? AA-30.ZERO has to be powered down then up on a reset. Or just flick the power switch.
• ignore wifi button while measurement is in progress.
• disconnect from wifi before measurement?