Liam Woffindin asked 3 months ago
edited for format
It’s possible I downloaded the library and the dependencies in the wrong order. It asks me on page 152 to download them in a certain order. I’ve tried deleting the dependencies and reinstalling the libraries. I’ve tried removing the esp32 and 8266 board manager then reinstalling. Nothing is working for me I keep getting this error. Any thoughts?
Error in full (I’ve replaced sensitive info with REDACTED)
In file included from c:\Users\lREDACTED\Documents\Arduino\libraries\AsyncMqttClient\src/AsyncMqttClient.h:4,
from C:\Users\REDACTED\Dropbox\REDACTED\0 Arduino code\0 Smart home\firstattempt\firstattempt.ino:13:
c:\Users\REDACTED\Documents\Arduino\libraries\AsyncMqttClient\src/AsyncMqttClient.hpp:20:10: fatal error: ESPmDNS.h: No such file or directory
20 | #include <ESPmDNS.h>
| ^~~~~~~~~~~
compilation terminated.
exit status 1
Compilation error: exit status 1
Full code (copy pasted from github, with my own stuff added, nothing has been changed)
/*********
Rui Santos
Complete instructions at https://RandomNerdTutorials.com/smart-home-ebook/
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files.
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*********/
#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <Ticker.h>
#include <AsyncMqttClient.h>
#define WIFI_SSID "admin"
#define WIFI_PASSWORD "Trapped91!"
#define MQTT_HOST IPAddress(192, 168, 1, 162)
#define MQTT_PORT 1883
#define BROKER_USER "admin"
#define BROKER_PASS "Trapped91!"
AsyncMqttClient mqttClient;
Ticker mqttReconnectTimer;
WiFiEventHandler wifiConnectHandler;
WiFiEventHandler wifiDisconnectHandler;
Ticker wifiReconnectTimer;
unsigned long previousMillis = 0; // Stores last time a message was published
const long interval = 10000; // Interval at which to publish values
void connectToWifi() {
Serial.println("Connecting to Wi-Fi...");
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
}
void connectToMqtt() {
Serial.println("Connecting to MQTT...");
mqttClient.connect();
}
void onWifiConnect(const WiFiEventStationModeGotIP& event) {
Serial.println("Connected to Wi-Fi.");
connectToMqtt();
}
void onWifiDisconnect(const WiFiEventStationModeDisconnected& event) {
Serial.println("Disconnected from Wi-Fi.");
mqttReconnectTimer.detach(); // ensure we don't reconnect to MQTT while reconnecting to Wi-Fi
wifiReconnectTimer.once(2, connectToWifi);
}
void onMqttConnect(bool sessionPresent) {
Serial.println("Connected to MQTT.");
Serial.print("Session present: ");
Serial.println(sessionPresent);
// Subscribe to topic "led" when it connects to the broker
uint16_t packetIdSub = mqttClient.subscribe("led", 2);
Serial.print("Subscribing at QoS 2, packetId: ");
Serial.println(packetIdSub);
// Publish on the "test" topic with qos 0
mqttClient.publish("test", 0, true, "test 1");
Serial.println("Publishing at QoS 0");
// Publish on the "test" topic with qos 1
uint16_t packetIdPub1 = mqttClient.publish("test", 1, true, "test 2");
Serial.print("Publishing at QoS 1, packetId: ");
Serial.println(packetIdPub1);
// Publish on the "test" topic with qos 2
uint16_t packetIdPub2 = mqttClient.publish("test", 2, true, "test 3");
Serial.print("Publishing at QoS 2, packetId: ");
Serial.println(packetIdPub2);
}
void onMqttDisconnect(AsyncMqttClientDisconnectReason reason) {
Serial.println("Disconnected from MQTT.");
if (WiFi.isConnected()) {
mqttReconnectTimer.once(2, connectToMqtt);
}
}
void onMqttSubscribe(uint16_t packetId, uint8_t qos) {
Serial.println("Subscribe acknowledged.");
Serial.print(" packetId: ");
Serial.println(packetId);
Serial.print(" qos: ");
Serial.println(qos);
}
void onMqttUnsubscribe(uint16_t packetId) {
Serial.println("Unsubscribe acknowledged.");
Serial.print(" packetId: ");
Serial.println(packetId);
}
void onMqttMessage(char* topic, char* payload, AsyncMqttClientMessageProperties properties, size_t len, size_t index, size_t total) {
// Do whatever you want when you receive a message
// Save the message in a variable
String receivedMessage;
for (int i = 0; i < len; i++) {
Serial.println((char)payload[i]);
receivedMessage += (char)payload[i];
}
// Turn the LED on or off accordingly to the message content
if (strcmp(topic, "led") == 0) {
if (receivedMessage == "true"){
digitalWrite(LED_BUILTIN, HIGH);
}
if (receivedMessage == "false"){
digitalWrite(LED_BUILTIN, LOW);
}
}
Serial.println("Publish received.");
Serial.print(" topic: ");
Serial.println(topic);
Serial.print(" qos: ");
Serial.println(properties.qos);
Serial.print(" dup: ");
Serial.println(properties.dup);
Serial.print(" retain: ");
Serial.println(properties.retain);
Serial.print(" len: ");
Serial.println(len);
Serial.print(" index: ");
Serial.println(index);
Serial.print(" total: ");
Serial.println(total);
}
void onMqttPublish(uint16_t packetId) {
Serial.println("Publish acknowledged.");
Serial.print(" packetId: ");
Serial.println(packetId);
}
void setup() {
Serial.begin(115200);
Serial.println();
Serial.println();
pinMode (LED_BUILTIN, OUTPUT);
wifiConnectHandler = WiFi.onStationModeGotIP(onWifiConnect);
wifiDisconnectHandler = WiFi.onStationModeDisconnected(onWifiDisconnect);
mqttClient.onConnect(onMqttConnect);
mqttClient.onDisconnect(onMqttDisconnect);
mqttClient.onSubscribe(onMqttSubscribe);
mqttClient.onUnsubscribe(onMqttUnsubscribe);
mqttClient.onMessage(onMqttMessage);
mqttClient.onPublish(onMqttPublish);
mqttClient.setServer(MQTT_HOST, MQTT_PORT);
mqttClient.setCredentials(BROKER_USER, BROKER_PASS);
connectToWifi();
}
void loop() {
unsigned long currentMillis = millis();
// Every X number of seconds (interval = 10 seconds)
// it publishes a new MQTT message
if (currentMillis - previousMillis >= interval) {
// Save the last time a new reading was published
previousMillis = currentMillis;
// Publish an MQTT message on topic counter
uint16_t packetIdPub1 = mqttClient.publish("counter", 1, true, String(random(0,20)).c_str());
Serial.printf("Publishing on topic %s at QoS 1, packetId: %i", "counter", packetIdPub1);
}
}
Sara Santos Staff answered 3 months ago
Hi.
There is currently an issue with the original AsyncMQTTClient library.
We forked that library to fix the issue. We have a new download link for that library.
That download link is updated on the latest version of the eBook version 1.5 updated September 2, 2024.
Make sure you are using the latest version of the eBook (version 1.5) and use the new link on the new version to download the library.
Remove any previous libraries with the same name.
I hope this is clear.
Let me know if this solves the issue.
Regards,
Sara
Liam Woffindin answered 3 months ago
Hello Sara, thank you for your help, it is much appreciated.
“Make sure you are using the latest version of the eBook (version 1.5)”
I confirm I’m using 1.5, I purchased it recently.
EDIT: I seem to be using the image inserter in this forum incorrectly because when I copy the imgur link into the inserter tool, it doesn’t work, so I’ve put a link to each screenshot where it is relevent. I don’t know what I’m doing wrong. I tried using the “embed” link and it didn’t seem to work either. I’ve just linked the url to each screenshot
I’ve made a public imgur post here with screenshots. Imgur link. As my OP suggests I had already removed and reinstalled all the libraries. I uninstalled the IDE but noticed that when reinstalled, it was all still present so I just did a complete wipe of all library, document and system files.
Still have the same issue
Here’s what I have found.
Searching reveals no library present…
https://imgur.com/S8aPSbV
But the libraries are still present in the documents folder
https://imgur.com/n4uRmXm
The dependencies are in the manager (I had removed them from the manager at the time I took the screenshot as I was troubleshooting)
When I try adding the .ZIP file again, the IDE recognises I’ve already done that and asks me to confirm the overwrite
I deleted all libraries, reinstalled them as before, still having issues. I closed down the IDE and restarted, made a new sketch, the library is still not present in the manager. There’s something it doesn’t like about the AsyncMqttClient library it seems
When I click “install” on the dependencies, I get the message that they’re also missing their own dependencies (I guess these are present in AsyncMqttClient?). It looks to me like there is something broken between the documents/arduino/libraries folder and the library manager.
Liam Woffindin answered 3 months ago
I’ve made progress (I think) but I’m not going to mark this as solved as I have yet to apply my changes to the rest of the section (5.1, using node red with the ESP8266 etc). And I’m not sure this fix will work with everyone.
I’ve managed to get the code to compile and upload to the ESP8266, I have yet to test if the code works (I will carry on the course and see if what I did was compatiable with the rest of the instructions). Here were the steps I took to solve this.
- I deleted all folders in documents/arduino/libraries
- I went to the github page for the library AsyncMqttClient (https://github.com/kurtgo/AsyncMqttClient)
- Clicked CODE, clicked download zip
- In the IDE, tabs at the top, Sketch -> Manage Libraries -> Add zip to library (as normal)
- Selected to the downloaded zip
- Repeated step 4 and 5 for the two dependencies as per page 152 in the course material
- Installed the two dependencies in the library manager (Still couldn’t find AsyncMqttClient)
- Restarted the IDE. Updated all libraries.
- Added my username/password/IP address as instructed later on in the section.
It compiled, I got the following message that I’ve never seen before in the console.
. Variables and constants in RAM (global, static), used 29376 / 80192 bytes (36%)
║ SEGMENT BYTES DESCRIPTION
╠══ DATA 1496 initialized variables
╠══ RODATA 1552 constants
╚══ BSS 26328 zeroed variables
. Instruction RAM (IRAM_ATTR, ICACHE_RAM_ATTR), used 60407 / 65536 bytes (92%)
║ SEGMENT BYTES DESCRIPTION
╠══ ICACHE 32768 reserved space for flash instruction cache
╚══ IRAM 27639 code in IRAM
. Code in flash (default, ICACHE_FLASH_ATTR), used 259920 / 1048576 bytes (24%)
║ SEGMENT BYTES DESCRIPTION
╚══ IROM 259920 code in flash
I don’t know if this is important.
As I say, I will continue the course and see if it works going forward before I declare this as a solution.
Sara Santos Staff answered 2 months ago
Hi.
Great.
I’m glad you made it work.
But, the link in the eBook to download the “fixed” library is this one
Async MQTT Client: https://randomnerdtutorials.com/async-mqtt-client-download
Regards,
Sara
Rafael Campos answered 2 months ago
Hey, how you guys been doing?
I’ve made the same path as Liam Woffindin and it seems to work now.
In my point of view to get the thing right:
1. Clean your library folder(if you are a Linux user, the path maybe something like that “home/Arduino/libraries”);
2. Go to the github(https://github.com/kurtgo/AsyncMqttClient) >> click “<> Code” >> then .ZIP;
3. Add on Arduino IDE: Sketch > Include LIbrary > Add .Zip library > add your downloaded library;
4. Do this same for the dependencies(links on ebook);
4.1. Install these 2 dependencies;
5. Close Arduino IDE;
6. Run Arduino IDE again and it’ll pop up the message “update all”, click on it(updates the library that you’ve put);
7. Compile the code (“V” sign) and upload it (“->” sign);
8. It will gave something like that:
. Variables and constants in RAM (global, static), used 29408 / 80192 bytes (36%)
║ SEGMENT BYTES DESCRIPTION
╠══ DATA 1496 initialized variables
╠══ RODATA 1576 constants
╚══ BSS 26336 zeroed variables
. Instruction RAM (IRAM_ATTR, ICACHE_RAM_ATTR), used 60407 / 65536 bytes (92%)
║ SEGMENT BYTES DESCRIPTION
╠══ ICACHE 32768 reserved space for flash instruction cache
╚══ IRAM 27639 code in IRAM
. Code in flash (default, ICACHE_FLASH_ATTR), used 259920 / 1048576 bytes (24%)
║ SEGMENT BYTES DESCRIPTION
╚══ IROM 259920 code in flash
esptool.py v3.0
Serial port /dev/ttyUSB0
Connecting….
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
MAC: c4:d8:d5:03:8d:18
Uploading stub…
Running stub…
Stub running…
Configuring flash size…
Auto-detected Flash size: 4MB
Compressed 294784 bytes to 213234…
Writing at 0x00000000… (7 %)
Writing at 0x00004000… (14 %)
Writing at 0x00008000… (21 %)
Writing at 0x0000c000… (28 %)
Writing at 0x00010000… (35 %)
Writing at 0x00014000… (42 %)
Writing at 0x00018000… (50 %)
Writing at 0x0001c000… (57 %)
Writing at 0x00020000… (64 %)
Writing at 0x00024000… (71 %)
Writing at 0x00028000… (78 %)
Writing at 0x0002c000… (85 %)
Writing at 0x00030000… (92 %)
Writing at 0x00034000… (100 %)
Wrote 294784 bytes (213234 compressed) at 0x00000000 in 18.8 seconds (effective 125.7 kbit/s)…
Hash of data verified.
Leaving…
Hard resetting via RTS pin…
Then go to Serial Monitor, set 115200 baud and its done.
Sara Santos Staff answered 2 months ago
Hi.
im glad it is working, but I recommend using the links in the ebook so that you know you’re using the same versions as we are.
Regards.
Sara