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Merge pull request #8 from chathura-de-silva/dev
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Implementation Wifi Accesspoint for Configuring user Router SSID and Password.
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@chathura-de-silva
chathura-de-silva authored Apr 23, 2024
2 parents afd531c + 4b32328 commit ac731b3
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41 changes: 40 additions & 1 deletion docs/README.md
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Expand Up @@ -85,10 +85,49 @@ lib_deps =
3. `check_temp()` - Reads the data from the `DHT11` sensor, prints a warning in the display if there is any parameter that is out of the specified limits. If there isn't any, plays an animation on the screen indicating it is actively monitoring those parameters.

# Configuration of Wireless Accesspoint and WiFi Credentials

## Hardcoded values
* You can change the default values for both the passwords and SSIDs of the Wireless Accesspoint created by the Smart Medibox as well as the default SSID and Password for your wireless internet access point.
* To do so, change the `./include/constants.h` accordingly.
* Existing default values are as follows.
```cpp
...
//SSID and Password of the Access point created by the Medibox.
#define AP_SSID "Smart Medibox"
#define AP_PASSWORD "abcdefgh"
...
//SSID and Password of your internet accesspoint.
//It is not necessary to change this here.
//You can change the effective values of these parameters anytime,
//Even after uploading the binary to the device.
#define DEFAULT_WIFI_SSID "MSI 8690" uploading.
#define DEFAULT_WIFI_PASSWORD "abcdefgh"
```

## Configuring your Internet Accesspoint credentials
* After the initial boot, the device tries to connect to the wireless network with the credentials mentioned above in the `constants.h`. If it is not the first boot, then it will read the credentials from the non-volatile memory of the device.

* If the device cannot find the Wifi network with the specified credentials within 10 seconds(You can change this waiting time in the `constants.h`), it will enter the `Wifi configuration Mode` where the device initiates a Wifi Accesspoint (a "Wireless Hotspot") which you can connect to using a device such as a smartphone or a pc.

The default credentials are as follows :
```
SSID : Smart Medibox
Password : abcdefgh
```

* The display will start displaying an IP address to you to visit to. Open the web browser and visit the IP address specified in the Device Display.(Usually this value is `192.168.4.1`)

![WifiConfig](./wifi_config.png)

* Enter your Router/Internet Accesspoint SSID and Password and hit `Save`. The device will reboot connecting to the wireless network you specified.

* While device is up and running, at any time you can change your accesspoint via the main menu of the device. Choose `Wifi Config Menu`.

# Known issues

Currently there are no known issues. If there is any, please open an issue in the `issus` section with a relavant label.
A Minor shortcoming : If you accidently entered the wifi configuration menu via the device menu and you don't want to change the current Wifi credentials.
* You have to either hard restart the device or refill with the same credentials and click `save` (To do this you have to connect to the Smart Medibox's Wifi Accesspoint and visit the relavant URL using your web browser.)

# Screenshot Gallery

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7 changes: 5 additions & 2 deletions include/Constants.h
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Expand Up @@ -15,5 +15,8 @@
#define UTC_OFFSET_DST 0 // Daytime offset is not implemented. hence kept zero to have no effect.
#define DEFAULT_UTC_OFFSET_H 5
#define DEFAULT_UTC_OFFSET_M 30
#define WIFI_SSID "MSI 8690"
#define WIFI_PASSWORD "abcdefgh"
#define AP_SSID "Smart Medibox" //SSID and Password of the Access point created by the ESP32.
#define AP_PASSWORD "abcdefgh"
#define WIFI_CONNECTION_LISTENING_TIMEOUT 10000 // 10 seconds
#define DEFAULT_WIFI_SSID "MSI 8690"
#define DEFAULT_WIFI_PASSWORD "abcdefgh"
6 changes: 5 additions & 1 deletion include/Functions.h
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Expand Up @@ -26,4 +26,8 @@ void load_user_settings();
void save_time_zone();
void save_alarm(int alarm);
void reset_preferences();
void save_is_alarm_enabled();
void save_is_alarm_enabled();
void save_wifi_credentials(String username, String password);

// Functions from webServer.cpp
void config_wifi();
4 changes: 4 additions & 0 deletions include/Globals.h
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Expand Up @@ -14,6 +14,8 @@ extern bool alarm_triggered[];
extern struct tm timeinfo;
extern int temp_offset_hours;
extern int temp_offset_minutes;
extern String wifi_username;
extern String wifi_password;
// images
extern const unsigned char splashScreen[];
extern const unsigned char tick[];
Expand All @@ -24,3 +26,5 @@ extern const unsigned char alarm_ring[];
extern const unsigned char alarm_disable[];
extern const unsigned char medicine_time[];
extern const unsigned char reset[];
extern const unsigned char wifi_fail [];
extern const unsigned char wifi_config [];
136 changes: 136 additions & 0 deletions src/images.cpp
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Expand Up @@ -537,6 +537,142 @@ const unsigned char wifi[] PROGMEM = {
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const unsigned char wifi_fail [] PROGMEM = {
// 'wifi_fail, 128x64px
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};

const unsigned char wifi_config [] PROGMEM = {
// 'wifi_config, 128x64px
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};

const unsigned char waveformAnimation[31][1024] PROGMEM = {

// 'frame_102_delay-0, 128x64px
Expand Down
34 changes: 22 additions & 12 deletions src/main.cpp
View file
Original file line number Diff line number Diff line change
Expand Up @@ -33,26 +33,36 @@ void setup()
display.clearDisplay();
display.drawBitmap(0, 0, splashScreen, 128, 64, WHITE); // This is not a modalpage. It is a splash screen. text is embedded to a bitmap.
display.display();
delay(1200);
WiFi.begin(WIFI_SSID, WIFI_PASSWORD, 6);
load_user_settings(); // loads data using preferences object. defaults assigned if not stored in preferences.
delay(1000);
WiFi.begin(wifi_username, wifi_password, 6);

unsigned long currentMillis = millis();
unsigned long previousMillis = currentMillis;
while (WiFi.status() != WL_CONNECTED)
{
delay(250);
show_modal_page(wifi, 0, "Waiting For Wifi", 18);
currentMillis = millis();
if (currentMillis - previousMillis >= WIFI_CONNECTION_LISTENING_TIMEOUT) // IF the limit gets exceeded, then the ESP32 will restart after getting wifi reconfigured.
{
// Serial.println("Failed to connect.");
show_modal_page(wifi_fail, 1000, "Wifi Failure!", 26);
config_wifi(); // This function is defined in webServer.cpp
ESP.restart();
}
}
show_modal_page(tick, 100, "Wifi Connected!", 20);
load_user_settings(); // loads data using preferences object. defaults assigned if not stored in preferences.
configTime(temp_offset_hours * 3600 + temp_offset_minutes * 60, UTC_OFFSET_DST, NTP_SERVER);
display.clearDisplay();
}

void loop()
{
update_time_with_check_alarm();
if (digitalRead(PB_OK) == LOW)
void loop()
{
delay(200);
go_to_menu();
update_time_with_check_alarm();
if (digitalRead(PB_OK) == LOW)
{
delay(200);
go_to_menu();
}
check_temp();
}
check_temp();
}
10 changes: 10 additions & 0 deletions src/preferences.cpp
View file
Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,8 @@ void load_user_settings()
alarm_enabled = preferences.getBool("alarm_enabled", false);
temp_offset_hours = preferences.getInt("utc_offset_h", DEFAULT_UTC_OFFSET_H);
temp_offset_minutes = preferences.getInt("utc_offset_m", DEFAULT_UTC_OFFSET_M);
wifi_username = preferences.getString("wifi_username", "");
wifi_password = preferences.getString("wifi_password", "");
preferences.end();
}

Expand Down Expand Up @@ -44,6 +46,14 @@ void save_is_alarm_enabled()
preferences.end();
}

void save_wifi_credentials(String username, String password)
{
preferences.begin("settings", false);
preferences.putString("wifi_username", username);
preferences.putString("wifi_password", password);
preferences.end();
}

void reset_preferences()
{
preferences.begin("settings", false);
Expand Down
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