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deadmans_hand
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using open-drain for power on signal, added option for sleep time.

This commit is contained in:
leca 2025-04-10 22:22:57 +03:00
parent 3cd3051149
commit b0e9dfea36
2 changed files with 12 additions and 9 deletions
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3
README.md
View File

@ -13,9 +13,10 @@ cp src/secrets.h.template src/secrets.h
nano src/secrets.h
```
If you wish to change GPIO pins, please, do it in ``src/src.info``
Flash the sketch in your board
2. Connect pin STATUS_PIN to anything in your server that has voltage when the server is running (usually some led on the forward panel)
3. Connect pin WAKE_PIN to power pin on your motherboard
4. Connect GND to motherboard's ground.
5. Make sure that the board has some power supply (usually you want to use 18650 Li-ion batteries) to be online when the power is down.
5. Make sure that the board has some power supply (usually you want to use 18650 Li-ion batteries) to be online when the power is down.

18
src/src.ino
View File

@ -10,13 +10,13 @@
#define STATUS_PIN D5
#define WAKE_PIN D6
#define SLEEP_TIME 5 // seconds
static bool wifi_lost = false;
static bool server_is_off = false;
void setup() {
Serial.begin(9600);
WiFi.mode(WIFI_STA);
WiFi.disconnect();
@ -24,16 +24,16 @@ void setup() {
Serial.println("Connecting to a Wi-Fi network");
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
while (WiFi.status() == WL_IDLE_STATUS) delay(100);
while (WiFi.status() == WL_IDLE_STATUS) delay(1000);
Serial.println("Wi-Fi connected");
pinMode(STATUS_PIN, INPUT);
pinMode(WAKE_PIN, OUTPUT);
pinMode(WAKE_PIN, INPUT);
}
void loop() {
wifi_lost = WiFi.status() == 1 || WiFi.status() == 5 || WiFi.status() == 7;
wifi_lost = WiFi.status() == WL_NO_SSID_AVAIL || WiFi.status() == WL_CONNECTION_LOST || WiFi.status() == 7;
server_is_off = digitalRead(STATUS_PIN) != HIGH;
Serial.println("Checking the status");
@ -46,13 +46,15 @@ void loop() {
Serial.println("The power seems to be down. Waiting for the power to restore and send turn on signal to the server.");
// Wait untill Wi-Fi is available (i.e. the power is back)
while (WiFi.status() != WL_CONNECTED) delay(100);
digitalWrite(WAKE_PIN, HIGH);
pinMode(WAKE_PIN, OUTPUT);
delay(100);
digitalWrite(WAKE_PIN, LOW);
pinMode(WAKE_PIN, INPUT);
Serial.println("Signal sent");
} else {
Serial.println("Everyting's okay, sleeping 5 secs");
Serial.print("Everyting's okay, sleeping ");
Serial.print(SLEEP_TIME);
Serial.println(" secs.");
}
delay(5000);
delay(SLEEP_TIME * 1000);
}