hx711: Check for DOUT going high after a reading (esphome#7214)

descipher · Aug 8, 2024 · 7fd6598 · 7fd6598
1 parent 24b6c1d
commit 7fd6598
Showing 1 changed file with 10 additions and 1 deletion.
diff --git a/esphome/components/hx711/hx711.cpp b/esphome/components/hx711/hx711.cpp
@@ -39,8 +39,8 @@ bool HX711Sensor::read_sensor_(uint32_t *result) {
     return false;
   }
 
-  this->status_clear_warning();
   uint32_t data = 0;
+  bool final_dout;
 
   {
     InterruptLock lock;
@@ -59,8 +59,17 @@ bool HX711Sensor::read_sensor_(uint32_t *result) {
       this->sck_pin_->digital_write(false);
       delayMicroseconds(1);
     }
+    final_dout = this->dout_pin_->digital_read();
   }
 
+  if (!final_dout) {
+    ESP_LOGW(TAG, "HX711 DOUT pin not high after reading (data 0x%" PRIx32 ")!", data);
+    this->status_set_warning();
+    return false;
+  }
+
+  this->status_clear_warning();
+
   if (data & 0x800000ULL) {
     data |= 0xFF000000ULL;
   }