From fc7724a0b892fe2407443e417988baa50de6284b Mon Sep 17 00:00:00 2001
From: Florian Pritz <bluewind@xinu.at>
Date: Wed, 1 Aug 2018 09:52:26 +0200
Subject: Support variable number of ds18b20 sensors

Signed-off-by: Florian Pritz <bluewind@xinu.at>
---
 src/main.cpp | 52 ++++++++++++++++++++++++++++++----------------------
 1 file changed, 30 insertions(+), 22 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index d8122a6..85fe3fa 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -3,6 +3,7 @@
 #include <DallasTemperature.h>
 #include <DHT.h>
 #include <stdlib.h>
+#include <inttypes.h>
 
 // Pin setup
 const int oneWirePin = 7;
@@ -18,35 +19,42 @@ DHT dht(dhtPin, DHTTYPE);
 void setup () {
 	Serial.begin(9600);
 	dht.begin();
+	sensors.begin();
 }
 
-void loop () {
-	sensors.requestTemperatures();
-
-	float t1 = sensors.getTempCByIndex(0);
-
-	float t2 = dht.readTemperature();
-	float h1 = dht.readHumidity();
-
-	char temp[BUFSIZE];
 
-	// format: <timestamp|0> t:1=<temp> t:2=<temp> h:1=<humidity>
-	String line = "";
-	line += 0;
+void print_float2serial(float val) {
+	char buf[BUFSIZE];
+	dtostrf(val, 5, 2, buf);
+	Serial.print(buf);
+}
+void print_value(char* type, uint8_t id, float val) {
+	Serial.print(" ");
+	Serial.print(type);
+	Serial.print(":");
+	Serial.print(id);
+	Serial.print("=");
+	print_float2serial(val);
+}
 
-	line += " t:1=";
-	dtostrf(t1, 5, 2, temp);
-	line += temp;
+void loop () {
+	sensors.requestTemperatures();
 
-	line += " t:2=";
-	dtostrf(t2, 5, 2, temp);
-	line += temp;
+	uint8_t devcounter = 0;
 
-	line += " h:1=";
-	dtostrf(h1, 5, 2, temp);
-	line += temp;
+	// output format: <timestamp|0> t:1=<temp> t:2=<temp> h:1=<humidity>
+	Serial.print("0");
+	for (uint8_t i = 0; i < sensors.getDeviceCount(); ++i) {
+		float temp = sensors.getTempCByIndex(i);
+		print_value("t", devcounter++, temp);
+	}
 
+	float t1 = dht.readTemperature();
+	float h1 = dht.readHumidity();
 
-	Serial.println(line);
+	print_value("t", devcounter, t1);
+	print_value("h", devcounter, h1);
+	devcounter++;
+	Serial.println();
 	delay(10000);
 }
-- 
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