Control Nefit boiler

[gjniewenhuijse]

You are missing Content-Length header for the POST request.

Code:

["Content-Length"] = #iData,

You should use json.encode instead of writing JSON manually to avoid potential errors.

Like this (but with same error)?

Code:

setData('thermostat/dhw/charge', {value = true})


function setData(iFunction, iData)
  if iDebug then log(devUrl..iFunction) end
  res, code = https.request({
      url = devUrl..iFunction,
      method = 'POST',
      headers = {["Content-Type"] = "application/json",
                           ["Content-Length"] = #iData
                          },
      data = json.encode(iData)
      })
  if iDebug then
      log(code, res)
  end
  return code, res
end