Yet Another Developer Blog

The libcurl library does not provide a clear example on how to issue HTTP PUT operations in a REST context; the examples are mainly about file transfers . For my proxy application this is not really what I need: I want to perform a REST HTTP PUT, keep it simple, meaning without using the "Expect" and "Transfer-Encoding" that libcurl adds by default. After some struggling I discovered that this behavior can be changed by using the following code: CURL * pCurl; struct curl_slist *headers = NULL; headers = curl_slist_append(headers, "Content-Type: application/json "); headers = curl_slist_append(headers, "Content-Length: 12345 "); headers = curl_slist_append(headers, "Expect:"); headers = curl_slist_append(headers, "Transfer-Encoding:"); pCurl = curl_easy_init(); curl_easy_setopt(pCurl, CURLOPT_VERBOSE, 1); curl_easy_setopt(pCurl, CURLOPT_PUT, 1); curl_easy_setopt(pCurl, CURLOPT_URL, " https://your-server.app...

In order to be able to refresh the persisted state of my binary sensors on my little web application, I extended my "Z-Wave proxy" to send some information when it initially starts. It retrieves data from a few "data holders": The current level (if the sensor is triggered or not). The configured wake-up interval. The last sleep time. The last wake-up time. The battery level. The following code can be used to do so. const ZWBYTE COMMAND_CLASS_ALARM = 113; const ZWBYTE COMMAND_CLASS_BATTERY = 128; const ZWBYTE COMMAND_CLASS_SENSOR_BINARY = 48; const ZWBYTE COMMAND_CLASS_WAKE_UP = 132; [...] bool level = findInstanceDataAsBoolean(aZWay, COMMAND_CLASS_SENSOR_BINARY, "level"); int wakeUpInterval = findInstanceDataAsInt(aZWay, COMMAND_CLASS_WAKE_UP, "interval"); int lastSleepTime = findInstanceDataAsInt(aZWay, COMMAND_CLASS_WAKE_UP, "lastSleep"); int lastWakeUpTime = findInstanceDataAsInt(aZWay, COMMAND_CLASS_WAKE_UP,...