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added SSL/TLS support for MQTT

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This commit is contained in:
Holger Fleischmann
2020-12-10 19:07:28 +01:00
parent 733ca426a4
commit 3518e171a1
3 changed files with 38 additions and 1 deletions
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1
include/credentials.h
View File

@@ -7,6 +7,7 @@ extern const char *thingspeakApiKey;
extern const char *mqttHost;
extern int mqttPort;
extern const char *mqttTlsServerRootCert;
extern const char *mqttUser;
extern const char *mqttPassword;
extern const char *mqttTopic;

25
src/TEMPLATE_secret_credentials.h
View File

@@ -20,6 +20,31 @@ const char *thingspeakApiKey = "MYAPIKEY";
// set host to NULL or empty string to disable MQTT publishing:
const char *mqttHost = "my.mqtt.server";
int mqttPort = 1833;
// set MQTT server's root CA cert to NULL or empty string to disable MQTT TLS/SSL:
const char *mqttTlsServerRootCert = R""""(
-----BEGIN CERTIFICATE-----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==
-----END CERTIFICATE-----
)"""";
const char *mqttUser = "user";
const char *mqttPassword = "mypassword";
const char *mqttTopic = "home/radioactivity";

11
src/ingest.cpp
View File

@@ -1,4 +1,5 @@
#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <MQTT.h>
#include "GeigerData.h"
@@ -8,6 +9,7 @@
const char *thingsPeakUrl = "api.thingspeak.com";
WiFiClient mqttWifiClient;
WiFiClientSecure mqttWifiClientSecure;
MQTTClient mqttClient;
bool connectWiFi()
@@ -149,13 +151,22 @@ bool connectMqtt()
if (!mqttClient.connected())
{
const bool tls = mqttTlsServerRootCert != NULL && mqttTlsServerRootCert[0] != 0;
Serial.print("Connecting to MQTT host ");
Serial.print(mqttHost);
Serial.print(":");
Serial.print(mqttPort);
Serial.print(" user ");
Serial.print(mqttUser);
if (tls) {
Serial.print(" with TLS ");
mqttWifiClientSecure.setCACert(mqttTlsServerRootCert);
mqttClient.begin(mqttHost, mqttPort, mqttWifiClientSecure);
} else {
Serial.print(" without TLS ");
mqttClient.begin(mqttHost, mqttPort, mqttWifiClient);
}
if (mqttClient.connect("esp32-geiger-counter", mqttUser, mqttPassword))
{
Serial.println(" successful");