Add ability to specify pulse length in ZactuatorONOFF (#1200)

* Add ability to specify pulse length in ZactuatorONOFF

Add an additional parameter to the MQTT message to control the actuatorONOFF pulse length e.g. `mosquitto_pub -t home/OpenMQTTGateway_MEGA/commands/MQTTtoONOFF -m '{"gpio":15,"cmd":"high_pulse","pulse_length":25}'`

* Simplify initialization of pulselength

docs/use/actuators.md

@@ -31,6 +31,14 @@ Goes ON for half a second, then back to OFF:
 Goes OFF for half a second, then back to ON:
 `mosquitto_pub -t home/OpenMQTTGateway_MEGA/commands/MQTTtoONOFF -m '{"gpio":15,"cmd":"low_pulse}"'`
 
+To specify activations other than half a second, include pulse_length and the time in ms.
+
+Goes ON for 25 ms, then back to OFF:
+`mosquitto_pub -t home/OpenMQTTGateway_MEGA/commands/MQTTtoONOFF -m '{"gpio":15,"cmd":"high_pulse","pulse_length":25}'`
+
+Goes OFF for 25 ms, then back to ON:
+`mosquitto_pub -t home/OpenMQTTGateway_MEGA/commands/MQTTtoONOFF -m '{"gpio":15,"cmd":"low_pulse","pulse_length":25}'`
+
 Be aware that outputs are OFF by default when the board first start.
 
 ## FASTLED

main/ZactuatorONOFF.ino

@@ -47,16 +47,20 @@ void MQTTtoONOFF(char* topicOri, JsonObject& ONOFFdata) {
       if (ONOFFdata["cmd"] == "high_pulse") {
         Log.notice(F("MQTTtoONOFF high_pulse ok" CR));
         Log.notice(F("GPIO number: %d" CR), gpio);
+        int pulselength = ONOFFdata["pulse_length"] | 500;
+        Log.notice(F("Pulse length: %d ms" CR), pulselength);
         pinMode(gpio, OUTPUT);
         digitalWrite(gpio, HIGH);
-        delay(500);
+        delay(pulselength);
         digitalWrite(gpio, LOW);
       } else if (ONOFFdata["cmd"] == "low_pulse") {
         Log.notice(F("MQTTtoONOFF low_pulse ok" CR));
         Log.notice(F("GPIO number: %d" CR), gpio);
+        int pulselength = ONOFFdata["pulse_length"] | 500;
+        Log.notice(F("Pulse length: %d ms" CR), pulselength);
         pinMode(gpio, OUTPUT);
         digitalWrite(gpio, LOW);
-        delay(500);
+        delay(pulselength);
         digitalWrite(gpio, HIGH);
       } else {
         Log.error(F("MQTTtoONOFF failed json read" CR));