Better logs for HTTP and MQTT requests

Author: dcelasun

http.go

@@ -38,6 +38,8 @@ func handleOCR(w http.ResponseWriter, r *http.Request) {
 	}
 	defer r.Body.Close()
 
+	log.Printf("OCR request received: image_bytes=%d bat_level=%d bat_voltage=%d", len(imageData), batLevel, batVoltage)
+
 	if len(imageData) == 0 {
 		http.Error(w, "empty body", http.StatusBadRequest)
 		return

mqtt.go

@@ -160,4 +160,5 @@ func publish(topic, payload string, retain bool) {
 	if token.Error() != nil {
 		log.Printf("MQTT publish error (%s): %v", topic, token.Error())
 	}
+	log.Printf("MQTT published payload %s to %s with retain=%v", payload, topic, retain)
 }