Lot of new functions for tinytest

- command every allowing to add peridic evaluations
  very usefull for benchmarks and load tests
- on/off command

examples/tinymqtt-test/tinymqtt-test.ino

@@ -138,7 +138,7 @@ std::set<std::string> commands = {
 	"auto", "broker", "blink", "client", "connect",
 	"create", "delete", "help", "interval",
 	"ls", "ip", "off", "on", "set",
-	"publish", "reset", "subscribe", "unsubscribe", "view"
+	"publish", "reset", "subscribe", "unsubscribe", "view", "every"
 };
 
 void getCommand(std::string& search)
@@ -316,74 +316,44 @@ std::map<MqttClient*, automatic*> automatic::autos;
 
 bool compare(std::string s, const char* cmd)
 {
-	if (s.length()==0 or s.length()>strlen(cmd))  return false;
+	uint8_t p=0;
-	return strncmp(cmd, s.c_str(), s.length())==0;
+	while(s[p++]==*cmd++)
+	{
+		if (*cmd==0 or s[p]==0) return true;
+		if (s[p]==' ') return true;
+	}
+	return false;
 }
 
 using ClientFunction = void(*)(std::string& cmd, MqttClient* publish);
 
+struct Every
+{
+	std::string cmd;
+	uint32_t ms;
+	uint32_t next;
+
+	void dump()
+	{
+		auto mill=millis();
+		Serial << ms << "ms [" << cmd << "] next in ";
+		if (mill > next)
+			Serial << "now";
+		else
+			Serial << next-mill << "ms";
+	}
+};
+
 uint32_t blink_ms_on[16];
 uint32_t blink_ms_off[16];
 uint32_t blink_next[16];
 bool blink_state[16];
 int16_t blink;
-void loop()
+
+std::vector<Every> everies;
+
+void eval(std::string& cmd)
 {
-	auto ms=millis();
-	int8_t out=0;
-	int16_t blink_bits = blink;
-	while(blink_bits)
-	{
-		if (blink_ms_on[out] and ms > blink_next[out])
-		{
-			if (blink_state[out])
-			{
-				blink_next[out] += blink_ms_on[out];
-				digitalWrite(out, LOW);
-			}
-			else
-			{
-				blink_next[out] += blink_ms_off[out];
-				digitalWrite(abs(out), HIGH);
-			}
-			blink_state[out] = not blink_state[out];
-		}
-		blink_bits >>=1;
-		out++;
-	}
-
-	static long count;
-  MDNS.update();
-
-	if (MqttClient::counter != count)
-	{
-		Serial << "# " << MqttClient::counter << endl;
-		count = MqttClient::counter;
-	}
-	for(auto it: brokers)
-		it.second->loop();
-
-	for(auto it: clients)
-		it.second->loop();
-
-	automatic::loop();
-
-	if (Serial.available())
-	{
-		static std::string cmd;
-		char c=Serial.read();
-
-		if (c==10 or c==14)
-		{
-
-			Serial << "----------------[ " << cmd.c_str() << " ]--------------" << endl;
-			static std::string last_cmd;
-			if (cmd=="!")
-				cmd=last_cmd;
-			else
-				last_cmd=cmd;
-
-			if (cmd.substr(0,3)!="set") replaceVars(cmd);
 	while(cmd.length())
 	{
 		MqttError retval = MqttOk;
@@ -501,6 +471,60 @@ void loop()
 				client->dump();
 			}
 		}
+		else if (compare(s, "on"))
+		{
+			uint8_t pin=getint(cmd, 2);
+			pinMode(pin, OUTPUT);
+			digitalWrite(pin, HIGH);
+		}
+		else if (compare(s, "off"))
+		{
+			uint8_t pin=getint(cmd, 2);
+			pinMode(pin, OUTPUT);
+			digitalWrite(pin, LOW);
+		}
+		else if (compare(s, "every"))
+		{
+			uint32_t ms = getint(cmd, 0);
+			if (ms and cmd.length())
+			{
+				Every every;
+				every.ms=ms;
+				every.cmd=cmd;
+				every.next=millis()+ms;
+				everies.push_back(every);
+				every.dump();
+				Serial << endl;
+				cmd="";
+			}
+			else if (ms==0 and compare(cmd, "list"))
+			{
+				getword(cmd);
+				Serial << "List of everies (ms=" << millis() << ")" << endl;
+				uint8_t count=0;
+				for(auto& every: everies)
+				{
+					Serial << count << ": ";
+					every.dump();
+					Serial << endl;
+					count++;
+				}
+			}
+			else if (ms==0 and compare(cmd, "remove"))
+			{
+				getword(cmd);
+				int8_t every=getint(cmd, -1);
+				if (every==-1 and compare(cmd, "all"))
+				{
+					getword(cmd);
+					everies.clear();
+				}
+				else if (everies.size() > (uint8_t)every)
+				{
+					everies.erase(everies.begin()+every);
+				}
+			}
+		}
 		else if (compare(s, "blink"))
 		{
 			int8_t blink_nr = getint(cmd, -1);
@@ -639,6 +663,8 @@ void loop()
 			Serial << "    set [name][value]" << endl;
 			Serial << "    !  repeat last command" << endl;
 			Serial << endl;
+			Serial << "  every ms [command]; every list; every remove [nr|all]" << endl;
+			Serial << "  on {output}; off {output}" << endl;
 			Serial << "  $id : name of the client." << endl;
 			Serial << "  default topic is '" << topic.c_str() << "'" << endl;
 			Serial << endl;
@@ -655,6 +681,76 @@ void loop()
 			Serial << "## ERROR " << retval << endl;
 		}
 	}
+}
+
+void loop()
+{
+	auto ms=millis();
+	int8_t out=0;
+	int16_t blink_bits = blink;
+
+	for(auto& every: everies)
+	{
+		if (every.ms && every.cmd.length() && ms > every.next)
+		{
+			std::string cmd(every.cmd);
+			eval(cmd);
+			every.next += every.ms;
+		}
+	}
+
+	while(blink_bits)
+	{
+		if (blink_ms_on[out] and ms > blink_next[out])
+		{
+			if (blink_state[out])
+			{
+				blink_next[out] += blink_ms_on[out];
+				digitalWrite(out, LOW);
+			}
+			else
+			{
+				blink_next[out] += blink_ms_off[out];
+				digitalWrite(abs(out), HIGH);
+			}
+			blink_state[out] = not blink_state[out];
+		}
+		blink_bits >>=1;
+		out++;
+	}
+
+	static long count;
+  MDNS.update();
+
+	if (MqttClient::counter != count)
+	{
+		Serial << "# " << MqttClient::counter << endl;
+		count = MqttClient::counter;
+	}
+	for(auto it: brokers)
+		it.second->loop();
+
+	for(auto it: clients)
+		it.second->loop();
+
+	automatic::loop();
+
+	if (Serial.available())
+	{
+		static std::string cmd;
+		char c=Serial.read();
+
+		if (c==10 or c==14)
+		{
+			Serial << "----------------[ " << cmd.c_str() << " ]--------------" << endl;
+			static std::string last_cmd;
+			if (cmd=="!")
+				cmd=last_cmd;
+			else
+				last_cmd=cmd;
+
+			if (cmd.substr(0,3)!="set") replaceVars(cmd);
+			eval(cmd);
 		}
 		else
 		{