From ceb7cb3d5f3d7f2155a4d28a2eae281d3cbdc871 Mon Sep 17 00:00:00 2001
From: Nikolay Vasilchuk <anonym.tsk@gmail.com>
Date: Wed, 7 Aug 2019 14:42:48 +0300
Subject: [PATCH] Warm up check

---
 esphome/components/mhz19/mhz19.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/esphome/components/mhz19/mhz19.cpp b/esphome/components/mhz19/mhz19.cpp
index cbac28f9c7..87d310c237 100644
--- a/esphome/components/mhz19/mhz19.cpp
+++ b/esphome/components/mhz19/mhz19.cpp
@@ -54,6 +54,12 @@ void MHZ19Component::update() {
   const int temp = int(response[4]) - 40;
   const uint8_t status = response[5];
 
+  if (status <= 1) {
+    ESP_LOGW(TAG, "MHZ19 now warming up... Status=0x%02X", status);
+    this->status_set_warning();
+    return;
+  }
+
   ESP_LOGD(TAG, "MHZ19 Received CO₂=%uppm Temperature=%d°C Status=0x%02X", ppm, temp, status);
   if (this->co2_sensor_ != nullptr)
     this->co2_sensor_->publish_state(ppm);