krichtof/the-cup
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warn if battery < 2.6V

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This commit is contained in:
Christophe Robillard 2025-12-24 17:33:23 +01:00
parent 710b1a7f79
commit d7750f81c9
1 changed files with 15 additions and 0 deletions
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15
the-cup.ino
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@ -19,6 +19,8 @@
#include <MFRC522DriverPinSimple.h> #include <MFRC522DriverPinSimple.h>
#include <MFRC522Debug.h> #include <MFRC522Debug.h>
#include "Adafruit_MAX1704X.h"
#define SS_PIN SDA #define SS_PIN SDA
#define RC522_POWER_PIN 1 #define RC522_POWER_PIN 1
#define SLEEP_DURATION 1 #define SLEEP_DURATION 1
@ -31,6 +33,8 @@ MFRC522 reader{driver_1}; // Create MFRC522 instance.
RTC_DATA_ATTR int nbCycles = 0; RTC_DATA_ATTR int nbCycles = 0;
Adafruit_MAX17048 lipo;
const char *rootCACertificate = R"string_literal( const char *rootCACertificate = R"string_literal(
-----BEGIN CERTIFICATE----- -----BEGIN CERTIFICATE-----
MIIFazCCA1OgAwIBAgIRAIIQz7DSQONZRGPgu2OCiwAwDQYJKoZIhvcNAQELBQAw MIIFazCCA1OgAwIBAgIRAIIQz7DSQONZRGPgu2OCiwAwDQYJKoZIhvcNAQELBQAw
@ -76,6 +80,8 @@ void setup() {
Serial.println(nbCycles++); Serial.println(nbCycles++);
#endif #endif
measureBattery();
pinMode(RC522_POWER_PIN, OUTPUT); pinMode(RC522_POWER_PIN, OUTPUT);
digitalWrite(RC522_POWER_PIN, HIGH); digitalWrite(RC522_POWER_PIN, HIGH);
reader.PCD_Init(); // Init each MFRC522 card. reader.PCD_Init(); // Init each MFRC522 card.
@ -97,6 +103,15 @@ void loop() {
} }
} }
void measureBattery() {
if (nbCycles % 10) {
lipo.begin();
if (lipo.cellVoltage() < 2.6) {
displayError();
}
}
}
void readCard(char reader_uid[]) { void readCard(char reader_uid[]) {
reader.PICC_HaltA(); reader.PICC_HaltA();
reader.PCD_StopCrypto1(); reader.PCD_StopCrypto1();