Smartthings status update

[Ozturker]

Hello all

I am successfully reading the status of individual devices from Smartthings

But when I am trying to set the status via command I am receiving 422.

Same code works from Postman. Is it a string issue?

Thank you in advanced for the comments

Code:

local https = require('ssl.https')
local ltn12 = require('ltn12')
local token = '++++++++'
local cam_id = '++++++++++'
-- Function to turn camera on or off using a raw JSON string
local function set_camera_onoff(cam_id, state)
  local cmd = state and 'on' or 'off'
  local body = string.format([[
{
  "commands": [
    {
      "component": "main",
      "capability": "switch",
      "command": "%s"
    }
  ]
}
]], cmd)
  log('Request body: ' .. body)
  local sink_tbl = {}
  local res, code = https.request({
    url     = 'https://api.smartthings.com/v1/devices/' .. cam_id .. '/commands',
    method  = 'POST',
    headers = {
      ['Content-Type']  = 'application/json',
      ['Authorization'] = 'Bearer ' .. token,
      ['Accept']        = 'application/json',
      ['User-Agent']    = 'Mozilla/5.0',
      ['Content-Length'] = tostring(#body)
    },
    source = ltn12.source.string(body),
    sink   = ltn12.sink.table(sink_tbl),
  })
  local response_body = table.concat(sink_tbl)
  log('SmartThings response code: ' .. tostring(code))
  log('SmartThings response body: ' .. response_body)
  return res, code, response_body
end
-- Usage:
set_camera_onoff(cam_id, true)  -- to turn ON
set_camera_onoff(cam_id, false) -- to turn OFF