From 2ae3b7a6e3ba58b2c12e50a9994d3f62ae19242d Mon Sep 17 00:00:00 2001
From: David Lehrian <david@lehrian.com>
Date: Fri, 20 Aug 2021 08:50:39 -0700
Subject: [PATCH 1/2] Add example.

Add example of using with 2 temperature sensors.  Also include the old call to get the single temperature to show backward compatability.
---
 main.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 main.c

diff --git a/main.c b/main.c
new file mode 100644
index 0000000..470b4bd
--- /dev/null
+++ b/main.c
@@ -0,0 +1,66 @@
+#include <stdio.h>
+#include "ds18b20.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "driver/gpio.h"
+
+// Temp Sensors are on GPIO26
+#define TEMP_BUS 26
+#define LED 2
+#define HIGH 1
+#define LOW 0
+#define digitalWrite gpio_set_level
+
+DeviceAddress tempSensors[2];
+
+void getTempAddresses(DeviceAddress *tempSensorAddresses) {
+	unsigned int numberFound = 0;
+	reset_search();
+	// search for 2 addresses on the oneWire protocol
+	while (search(tempSensorAddresses[numberFound],true)) {
+		numberFound++;
+		if (numberFound == 2) break;
+	}
+	// if 2 addresses aren't found then flash the LED rapidly
+	while (numberFound != 2) {
+		numberFound = 0;
+		digitalWrite(LED, HIGH);
+		vTaskDelay(100 / portTICK_PERIOD_MS);
+		digitalWrite(LED, LOW);
+		vTaskDelay(100 / portTICK_PERIOD_MS);
+		// search in the loop for the temp sensors as they may hook them up
+		reset_search();
+		while (search(tempSensorAddresses[numberFound],true)) {
+			numberFound++;
+			if (numberFound == 2) break;
+		}
+	}
+	return;
+}
+
+void app_main(void){
+    gpio_reset_pin(LED);
+    /* Set the GPIO as a push/pull output */
+    gpio_set_direction(LED, GPIO_MODE_OUTPUT);
+
+	ds18b20_init(TEMP_BUS);
+	getTempAddresses(tempSensors);
+	ds18b20_setResolution(tempSensors,2,10);
+
+	printf("Address 0: 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x \n", tempSensors[0][0],tempSensors[0][1],tempSensors[0][2],tempSensors[0][3],tempSensors[0][4],tempSensors[0][5],tempSensors[0][6],tempSensors[0][7]);
+	printf("Address 1: 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x \n", tempSensors[1][0],tempSensors[1][1],tempSensors[1][2],tempSensors[1][3],tempSensors[1][4],tempSensors[1][5],tempSensors[1][6],tempSensors[1][7]);
+
+	while (1) {
+		ds18b20_requestTemperatures();
+		float temp1 = ds18b20_getTempF((DeviceAddress *)tempSensors[0]);
+		float temp2 = ds18b20_getTempF((DeviceAddress *)tempSensors[1]);
+		float temp3 = ds18b20_getTempC((DeviceAddress *)tempSensors[0]);
+		float temp4 = ds18b20_getTempC((DeviceAddress *)tempSensors[1]);
+		printf("Temperatures: %0.1fF %0.1fF\n", temp1,temp2);
+		printf("Temperatures: %0.1fC %0.1fC\n", temp3,temp4);
+
+		float cTemp = ds18b20_get_temp();
+		printf("Temperature: %0.1fC\n", cTemp);
+		vTaskDelay(1000 / portTICK_PERIOD_MS);
+	}
+}

From 17ba05606cc2327a13f62c09f92bcfef0cc18526 Mon Sep 17 00:00:00 2001
From: David Lehrian <david@lehrian.com>
Date: Tue, 12 Oct 2021 11:52:12 -0700
Subject: [PATCH 2/2] Update ds18b20.h

Added "extern C" to make the library compatible with C++.
---
 ds18b20.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/ds18b20.h b/ds18b20.h
index c2e8cf3..2939e12 100644
--- a/ds18b20.h
+++ b/ds18b20.h
@@ -39,6 +39,12 @@ static const uint8_t dscrc2x16_table[] = {
 	0x8C, 0x11, 0xAF, 0x32, 0xCA, 0x57, 0xE9, 0x74
 };
 
+/* *INDENT-OFF* */
+#ifdef __cplusplus
+    extern "C" {
+#endif
+/* *INDENT-ON* */
+
 void ds18b20_init(int GPIO);
 
 #define ds18b20_send ds18b20_write
@@ -70,4 +76,10 @@ float ds18b20_get_temp(void);
 void reset_search();
 bool search(uint8_t *newAddr, bool search_mode);
 
+/* *INDENT-OFF* */
+#ifdef __cplusplus
+    }
+#endif
+/* *INDENT-ON* */
+
 #endif