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EasyBlynk8266.cpp
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EasyBlynk8266.cpp
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#include "EasyBlynk8266.h"
String root_html_template = " \
<!DOCTYPE html> \
<meta name=\"robots\" content=\"noindex\"> \
<html> \
<head> \
<meta charset=\"utf-8\"> \
<meta name=\"viewport\" content=\"width=device-width\"> \
<title>EasyBlynk8266</title> \
</head> \
<body> \
<div align=\"center\"> \
<table> \
<tbody> \
<tr> \
<th colspan=\"2\">Wifi</th> \
</tr> \
<tr> \
<td>SSID</td> \
<td><input type=\"text\" value=\"[[wifi_ssid]]\" id=\"wifi_ssid\"></td> \
</tr> \
<tr> \
<td>Passphrase</td> \
<td><input type=\"text\" value=\"[[wifi_passphrase]]\" id=\"wifi_passphrase\"></td> \
</tr> \
<tr> \
<th colspan=\"2\">Blynk</th> \
</tr> \
<tr> \
<td>Server</td> \
<td><input type=\"text\" value=\"[[blynk_server]]\" id=\"blynk_server\"></td> \
</tr> \
<tr> \
<td>Port</td> \
<td><input type=\"text\" value=\"[[blynk_port]]\" id=\"blynk_port\"></td> \
</tr> \
<tr> \
<td>Token</td> \
<td><input type=\"text\" value=\"[[blynk_token]]\" id=\"blynk_token\"></td> \
</tr> \
<tr> \
<td colspan=\"2\" align=\"center\"> \
<button onclick=\"save()\">Save</button> \
</td> \
</tr> \
</tbody> \
</table> \
</div> \
<script id=\"jsbin-javascript\"> \
function updateValue(key, value) { \
var request = new XMLHttpRequest(); \
var url = '/?key=' + key + '&value=' + value; \
console.log('calling ' + url + '...'); \
request.open('GET', url, false); \
request.send(null); \
} \
function save() { \
updateValue('wifi_ssid', document.getElementById('wifi_ssid').value); \
updateValue('wifi_passphrase', document.getElementById('wifi_passphrase').value); \
updateValue('blynk_server', document.getElementById('blynk_server').value); \
updateValue('blynk_port', document.getElementById('blynk_port').value); \
updateValue('blynk_token', document.getElementById('blynk_token').value); \
alert('Updated Configurations'); \
} \
</script> \
</body> \
</html>";
EasyBlynk8266Class::EasyBlynk8266Class(BlynkArduinoClient& transp) : Base(transp) {
EEPROM.begin(512);
EEPROM.get(0, config);
if (strncmp(config.header, "ESP8266", 7) != 0) {
// doesn't have any configuration
strcpy(config.header, "ESP8266");
strcpy(config.wifi_ssid, "not_configured_yet");
strcpy(config.wifi_passphrase, "not_configured_yet");
strcpy(config.blynk_server, "not_configured_yet");
config.blynk_port = 0;
strcpy(config.blynk_token, "not_configured_yet");
EEPROM.put(0, config);
EEPROM.commit();
}
}
void EasyBlynk8266Class::begin() {
pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, HIGH);
Base::begin(config.blynk_token);
conn.begin(config.blynk_server, config.blynk_port);
if (connectToWifi(30000) && connect()) {
flash(3);
} else {
// failed to connect to Blynk server, will start configuration mode
startConfigurationMode();
}
}
void EasyBlynk8266Class::run() {
if (configuration_mode) {
server.handleClient();
configuration_mode_led_timer.run();
return;
}
Base::run();
}
void EasyBlynk8266Class::flash(int n) {
for (int i = 0; i < n; i++) {
delay(100);
digitalWrite(LED_BUILTIN, LOW);
delay(100);
digitalWrite(LED_BUILTIN, HIGH);
}
}
boolean EasyBlynk8266Class::connectToWifi(int timeout) {
int sleep_time = 100;
WiFi.mode(WIFI_STA);
if (config.wifi_passphrase && strlen(config.wifi_passphrase)) {
WiFi.begin(config.wifi_ssid, config.wifi_passphrase);
} else {
WiFi.begin(config.wifi_ssid);
}
while (WiFi.status() != WL_CONNECTED && 0 < timeout) {
delay(sleep_time);
timeout -= sleep_time;
}
return WiFi.status() == WL_CONNECTED;
}
void EasyBlynk8266Class::startConfigurationMode() {
IPAddress apIP(192, 168, 1, 1);
WiFi.mode(WIFI_AP);
WiFi.softAP("EasyBlynk8266-Config");
delay(100); // ref: https://github.com/espressif/arduino-esp32/issues/985#issuecomment-359157428
WiFi.softAPConfig(apIP, apIP, IPAddress(255, 255, 255, 0));
server.on("/", []() {
EasyBlynk8266.handleRequest();
});
server.begin();
configuration_mode_led_timer.setInterval(1000L, []() {
EasyBlynk8266.flash(1);
});
configuration_mode = true;
}
void EasyBlynk8266Class::handleRequest() {
String key = server.arg("key");
String value = server.arg("value");
if (key == "" && value == "") {
String result = root_html_template;
result.replace("[[wifi_ssid]]", config.wifi_ssid);
result.replace("[[wifi_passphrase]]", config.wifi_passphrase);
result.replace("[[blynk_server]]", config.blynk_server);
result.replace("[[blynk_port]]", String(config.blynk_port));
result.replace("[[blynk_token]]", config.blynk_token);
server.send(200, "text/html", result);
return;
}
if (key == "wifi_ssid") {
strcpy(config.wifi_ssid, value.c_str());
}
if (key == "wifi_passphrase") {
strcpy(config.wifi_passphrase, value.c_str());
}
if (key == "blynk_server") {
strcpy(config.blynk_server, value.c_str());
}
if (key == "blynk_port") {
config.blynk_port = value.toInt();
}
if (key == "blynk_token") {
strcpy(config.blynk_token, value.c_str());
}
EEPROM.put(0, config);
EEPROM.commit();
server.send(200, "text/html", "OK");
};
WiFiClient _blynk_wifi_client;
BlynkArduinoClient _blynk_transport(_blynk_wifi_client);
EasyBlynk8266Class EasyBlynk8266(_blynk_transport);