diff --git a/platformio.ini b/platformio.ini
index f0865d3..5fdad78 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -36,3 +36,23 @@ build_flags = ${common.build_flags} -DNODE_GREENHOUSE -DHOSTNAME=\"Greenhouse\"
 monitor_speed = ${common.monitor_speed}
 upload_protocol = espota
 upload_port = 10.0.0.169
+
+[env:FermenterUSB]
+platform = ${esp12e.platform}
+board = ${esp12e.board}
+framework = ${common.framework}
+lib_deps = ${common.lib_deps}
+build_flags = ${common.build_flags} -DNODE_FERMENTER -DHOSTNAME=\"Fermenter\"
+monitor_speed = ${common.monitor_speed}
+upload_port = /dev/ttyUSB0
+upload_speed = 460800
+
+[env:FermenterOTA]
+platform = ${esp12e.platform}
+board = ${esp12e.board}
+framework = ${common.framework}
+lib_deps = ${common.lib_deps}
+build_flags = ${common.build_flags} -DNODE_FERMENTER -DHOSTNAME=\"Fermenter\"
+monitor_speed = ${common.monitor_speed}
+upload_protocol = espota
+;upload_port = 10.0.0.169
diff --git a/src/Fermenter.cpp b/src/Fermenter.cpp
new file mode 100644
index 0000000..ad15e74
--- /dev/null
+++ b/src/Fermenter.cpp
@@ -0,0 +1,24 @@
+#ifdef NODE_FERMENTER
+
+#include "patrix/bme680.h"
+#include "patrix/tsl2561.h"
+
+DS18B20 ds18b20();
+
+DS18B20Sensor sensor(ds18b20);
+
+PWMOutput heater();
+
+void patrixSetup() {
+  ds18b20.setup();
+  sensor.setup();
+  heater.setup();
+}
+
+void patrixLoop() {
+  ds18b20.loop();
+  sensor.loop();
+  heater.loop();
+}
+
+#endif
\ No newline at end of file
diff --git a/src/patrix/DS18B20.h b/src/patrix/DS18B20.h
new file mode 100644
index 0000000..7708e58
--- /dev/null
+++ b/src/patrix/DS18B20.h
@@ -0,0 +1,74 @@
+#ifndef HELLIGKEIT_DS18B20_H
+#define HELLIGKEIT_DS18B20_H
+
+#include "OneWire.h"
+#include "DallasTemperature.h"
+
+class DS18B20 {
+
+  enum State {
+    IDLE, CONVERTING, DONE
+  };
+
+  String& name;
+
+  const int pin;
+
+  OneWire oneWire;
+
+  DallasTemperature sensors;
+
+  State state = IDLE;
+
+  unsigned long timeout = 1000;
+
+public:
+
+  explicit DS18B20(String& name, int pin) : name(name), pin(pin), oneWire(pin), sensors(&oneWire) {
+    // nothing
+  }
+
+  void begin() {
+    sensors.begin();
+    sensors.setWaitForConversion(false);
+  }
+
+  void loop() {
+    switch (state) {
+      case IDLE:
+        sensors.requestTemperatures();
+        break;
+      case CONVERTING:
+        if (sensors.isConversionComplete()) {
+
+        } else if (millis() - last > timeout) {
+          Serial.printf("DS18B20 \"%s\" pin #%d: timeout", name.c_str(), pin);
+        }
+    }
+  }
+
+};
+
+class DS18B20Sensor {
+
+  DS18B20& bus;
+
+  const int index;
+
+public:
+
+  DS18B20Sensor(DS18B20& bus, int index) : bus(bus), index(index) {
+    //
+  }
+
+  void setup() {
+
+  }
+
+  void loop() {
+
+  }
+
+};
+
+#endif //HELLIGKEIT_DS18B20_H