Reading ADC15 value?

Steve79 · August 12, 2020, 12:26pm

hi all,

i need to read the ADC15 value (which corresponds to the v on ADC input pin on the Cube 2.1). This is my first attempt to lua scripting so pls be patient :). Any suggestion?
also, i would need a command to trigger camera.

Felix · August 19, 2020, 7:53am

Hi Steve,

Do you need that voltage in Lua or do you just want to show it on the screen and log it?

In the last case, you wouldn’t even need Lua Scripting. You could treat the voltage like it was coming from an analog sonar sensor. Maybe this thread is helpful:

Steve79 · August 19, 2020, 8:26am

actually, i would like to get it in LUA because i want it to “bind” to the camera trigger (actually i want to implement a physical camera trigger button, reading through ADC15–>when 0, do trigger)

iampete · August 19, 2020, 8:41am

You cant read ADC in lua currently, but it sounds like you want a button in any-case we can do those,

github.com

ArduPilot/ardupilot/blob/master/libraries/AP_Scripting/examples/button_test.lua

-- This script is an example button functionality

local button_number = 1 -- the button numbber we want to read, as deffined in AP_Button

local button_active_state = true -- the 'pressed' state of the button

local last_button_state

function update() -- this is the loop which periodically runs

  local button_new_state = button:get_button_state(button_number) == button_active_state

  -- the button has changes since the last loop
  if button_new_state ~= last_button_state then
    last_button_state = button_new_state
    if button_new_state then
      gcs:send_text(0, "LUA: Button pressed")
    else
      gcs:send_text(0, "LUA: Button released")
    end

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