Permitir adquisicion parcial de sensores EZO

README.md

@@ -74,6 +74,19 @@ sudo ./scripts/install-raspberry-pi.sh
 La guía de preparación, detección I2C, calibración y prueba integral está en
 [`docs/RASPBERRY_PI_DEPLOYMENT.md`](docs/RASPBERRY_PI_DEPLOYMENT.md).
 
+## Sensores conectados parcialmente
+
+Para pruebas con solo EZO-RTD conectado, limite la adquisicion al sensor de
+temperatura:
+
+```bash
+EZO_MODE=hardware EZO_ENABLED_SENSORS=temperature npm run acquire
+```
+
+En produccion puede dejar `EZO_ENABLED_SENSORS=temperature` en
+`/etc/default/photobioreactor`. Cuando esten conectados los cuatro circuitos,
+deje la variable vacia para consultar RTD, pH, DO y EC.
+
 ## Archivos de datos
 
 - Lecturas actuales: `data/EZORTD.json`, `EZOPH.json`, `EZODO.json`,

api/acquisition-service.js

@@ -32,6 +32,13 @@ const SENSOR_FILES = {
 };
 
 const ALLOWED_LOGGING_RATES = new Set([1, 5, 10, 60]);
+const SENSOR_ALIASES = {
+    rtd: 'temperature',
+    temperature: 'temperature',
+    ph: 'ph',
+    do: 'do',
+    ec: 'ec'
+};
 
 async function atomicWriteFile(filePath, content) {
     await fsPromises.mkdir(path.dirname(filePath), { recursive: true });
@@ -104,9 +111,14 @@ function buildDemoReadings() {
 }
 
 async function readHardwareSensors() {
+    const enabledSensors = String(process.env.EZO_ENABLED_SENSORS || '')
+        .split(',')
+        .map((sensor) => SENSOR_ALIASES[sensor.trim().toLowerCase()])
+        .filter(Boolean);
+    const helperArguments = ['/dev/i2c-1', ...new Set(enabledSensors)];
     const { stdout } = await execFileAsync(
         ACQUISITION_HELPER,
-        ['/dev/i2c-1'],
+        helperArguments,
         { timeout: 5000, windowsHide: true }
     );
     const readings = JSON.parse(stdout.trim());

deployment/photobioreactor.env

@@ -2,3 +2,5 @@ NODE_ENV=production
 PORT=3000
 HOST=127.0.0.1
 EZO_MODE=hardware
+# Deje vacio para consultar todos. Use "temperature" durante pruebas con solo RTD.
+EZO_ENABLED_SENSORS=

sensors/EZOCommand/acquire.c

@@ -14,8 +14,38 @@ typedef struct
     int address;
     double value;
     int valid;
+    int enabled;
 } sensor_t;
 
+static int sensor_matches(const sensor_t *sensor, const char *name)
+{
+    return strcmp(sensor->name, name) == 0 ||
+           (strcmp(sensor->name, "temperature") == 0 && strcmp(name, "rtd") == 0);
+}
+
+static void enable_requested_sensors(sensor_t *sensors, size_t sensor_count, int argc, char *argv[])
+{
+    if (argc == 2)
+    {
+        for (size_t index = 0; index < sensor_count; index++)
+        {
+            sensors[index].enabled = 1;
+        }
+        return;
+    }
+
+    for (int arg = 2; arg < argc; arg++)
+    {
+        for (size_t index = 0; index < sensor_count; index++)
+        {
+            if (sensor_matches(&sensors[index], argv[arg]))
+            {
+                sensors[index].enabled = 1;
+            }
+        }
+    }
+}
+
 static int select_sensor(int fd, int address)
 {
     return ioctl(fd, I2C_SLAVE, address);
@@ -81,18 +111,19 @@ static int receive_reading(int fd, sensor_t *sensor)
 
 int main(int argc, char *argv[])
 {
-    if (argc != 2)
+    if (argc < 2)
     {
-        fprintf(stderr, "Uso: EZO_ACQUIRE /dev/i2c-1\n");
+        fprintf(stderr, "Uso: EZO_ACQUIRE /dev/i2c-1 [temperature|ph|do|ec]\n");
         return 2;
     }
 
     sensor_t sensors[] = {
-        {"temperature", 0x66, 0.0, 0},
+        {"temperature", 0x66, 0.0, 0, 0},
-        {"ph", 0x63, 0.0, 0},
+        {"ph", 0x63, 0.0, 0, 0},
-        {"do", 0x61, 0.0, 0},
+        {"do", 0x61, 0.0, 0, 0},
-        {"ec", 0x64, 0.0, 0}};
+        {"ec", 0x64, 0.0, 0, 0}};
     const size_t sensor_count = sizeof(sensors) / sizeof(sensors[0]);
+    enable_requested_sensors(sensors, sensor_count, argc, argv);
     int lock_fd = open(
         "/tmp/photobioreactor-i2c.lock",
         O_CREAT | O_RDWR,
@@ -115,9 +146,12 @@ int main(int argc, char *argv[])
     }
 
     for (size_t index = 0; index < sensor_count; index++)
+    {
+        if (sensors[index].enabled)
         {
             request_reading(fd, &sensors[index]);
         }
+    }
 
     usleep(1000000);
 

test/static.test.js

@@ -56,9 +56,12 @@ test('dashboard uses locally installed chart and spreadsheet libraries', () => {
 
 test('hardware acquisition batches all EZO addresses under the shared lock', () => {
     const source = read('sensors/EZOCommand/acquire.c');
+    const acquisitionService = read('api/acquisition-service.js');
 
     for (const address of ['0x61', '0x63', '0x64', '0x66']) {
         assert.match(source, new RegExp(address));
     }
     assert.match(source, /photobioreactor-i2c\.lock/);
+    assert.match(source, /EZO_ACQUIRE \/dev\/i2c-1 \[temperature\|ph\|do\|ec\]/);
+    assert.match(acquisitionService, /EZO_ENABLED_SENSORS/);
 });