ESP32 Forum

Code: Select all

void updateServer()
{
	Serial.print("\nconnecting to ");
	Serial.print(SERVER_HOST);

	WiFiClient client;
	if (!client.connect(SERVER_HOST, SERVER_PORT)) {
		Serial.println(" - connection failed");
		return;
	}

	Serial.println(" - connected to: " + SERVER_URL);

	// set http timeout after connected - default is 5 seconds, increase to 30
	httpClient.setTimeout(30 * 1000);

	// Domain name with URL path or IP address with FULL path
	httpClient.begin(SERVER_URL);

	// Specify content-type header
	httpClient.addHeader("X-API-AUTH", String(api_token));

	// HTTP request with a content type: application/json
	httpClient.addHeader("Content-Type", "application/json");

	// build the JSON object - NOTE: make sure to delimit all internal double-quotes 
	String json = "{"
		"\"device_uuid\":\"" + String(device_uuid) + "\","
		"\"last_mac\":\"" + String(ethMacAddress) + "\","
		"\"last_ip\":\"" + String(ethIpAddress) + "\","
		"\"inputs\":{"
			"\"1\":{"
				"\"input_uuid\":\"" + String(input_1_uuid) + "\","
				"\"value\":" + input_1_data + ","
				"\"unit\":\"" + String(input_1_unit) + "\","
				"\"scalefactor\":" + input_1_sf +
			"},"
			"\"2\":{"
				"\"input_uuid\":\"" + String(input_2_uuid) + "\","
				"\"value\":" + input_2_data + ","
				"\"unit\":\"" + String(input_2_unit) + "\","
				"\"scalefactor\":" + input_2_sf +
			"},"
			"\"3\":{"
				"\"input_uuid\":\"" + String(input_3_uuid) + "\","
				"\"value\":" + input_3_data + ","
				"\"unit\":\"" + String(input_3_unit) + "\","
				"\"scalefactor\":" + input_3_sf +
			"},"
			"\"4\":{"
				"\"input_uuid\":\"" + String(input_4_uuid) + "\","
				"\"value\":" + input_4_data + ","
				"\"unit\":\"" + String(input_4_unit) + "\","
				"\"scalefactor\":" + input_4_sf +
			"}"
		"}"
	"}";

	Serial.println(json);

	int httpResponseCode = httpClient.POST(json);

	Serial.print("HTTP Response code: (");
	Serial.print(httpResponseCode);
	Serial.print(")  ");
	Serial.println(httpClient.errorToString(httpResponseCode));

	// Free resources
	httpClient.end();

	client.stop();
	Serial.println("closing connection\n");
}

Code: Select all

Pseudo-code:
{	
	Create Client
	Client.connect()
	Set Certificate/Key or CA
	{
		Create HTTPClient
		Change HTTPClient options
		... do the work ...
		HTTPClient.end()
	}
	Client.stop()
}