Re-join Spruce Sensor to the Network

Contents

Follow the steps in this article to reset the sensor, if you are having trouble connecting Spruce Sensors to the network, or if the Spruce Sensor isn’t working properly.  Please perform these steps next to your Spruce Controller (within 5 feet or standing next to the Controller) to eliminate any range concerns.

Remove and Re-add the Sensor

Remove Spruce Sensor from the network

  1. Unpair the Sensor by holding the magnet to the magnet pad for ~5 seconds. The sensor will then beep 5 times – that means it has unjoined.
    • The sensor will only beep 5 times if it is currently joined to a ZigBee network. The beeping 5 times is indicative of the removal process. If the sensor does not beep 5 times after holding the magnet to the magnet pad, the sensor is already unjoined.
    • The sensor will not remove itself from the app when it is removed physically. The presence of the sensor in your account will not prevent the sensor from joining the network again, so it is not necessary to remove the sensor from the app, if you intend to add it again.

Reconnect or Re-join Spruce Sensor to the network

  1. In the Spruce App, open the navigation menu and click or tap the + Add Devices option
  2. Select “Spruce Sensor” and follow the on-screen instructions.

Connecting the Sensor to a third party network (such as SmartThings)

The Spruce Sensor can only connect to one Zigbee network at a time.  For sensors connected to a SmartThings Hub, it is possible to connect a Spruce Sensor to SmartThings, and “share” the sensor data with the Spruce app. See this article for more information.

  1. Initiate the “join” or “add device” routine in the third party app. The third party app should be searching for devices.
  2. Tap the magnet once to the magnet pad to start the join process on the sensor. When the device has been found by the parent network, the sensor should beep 3 times.

Sensor Beep Codes

Magnet UsageNumber of BeepsExplanation 
Quick Tap1The sensor is not currently connected to a parent network. The sensor has moved into join/search mode, and will continue for approximately 10 seconds.
Quick Tap2The sensor has a parent Zigbee network, but is not currently connected (perhaps due to range)
Quick Tap2, then 5The two beeps indicates that the sensor has a parent Zigbee network, but is not currently connected. The subsequent 5 beeps indicates that the sensor has been disconnected for a substantial period of time, and is attempting to leave the parent network. See below for more troubleshooting.
Quick Tap3The sensor is currently connected to a Zigbee network
Quick Tap1, then 3The first beep indicates that the sensor has moved into join/search mode. The subsequent 3 beeps indicates that the sensor has successfully joined a parent network.
Long Hold (5 seconds)1The sensor acknowledged the long hold. If you are trying to remove a sensor, and expected 5 beeps to follow, the absence of the 5 beeps indicates that the sensor was not connected to a network to begin with, and therefore could not remove itself from a network.
Long Hold (5 seconds)1, then 5The first beep indicates that the sensor acknowledged the long hold. The 5 beeps indicates that the sensor has initiated the process to remove itself from the parent network.

Troubleshooting if the Sensor did not connect

Sensor is not beeping

  • The sensor battery may be depleted
    • If you have a voltmeter handy, try removing the battery and measure the voltage of the battery. If the voltage is below 2.3V, a new battery may be needed.
    • The CR2477 batteries have their own internal resistance as well; you may notice that the voltage reads low after it is removed from a sensor, then slowly climbs back up – on the order of 1mV/second. After a while the battery maybe recover as much as 0.1 or 0.2 V.  If you see this, it’s a good idea to let the battery sit for 15-30 minutes until it equilibrates, to get a better idea of the voltage.
  • The battery may need to be discharged and re-installed

Sensor beeps once, but never joins

  • The magnet tap (to initiate the join process on the sensor) must be done after the controller (hub) is listening/searching for devices. The Spruce Controller will flash red when in listening mode.
  • The sensor join process (which is initiated by the quick magnet tap) will timeout after roughly 10 seconds. If the sensor hasn’t joined after 10 seconds, you may try tapping the magnet to the magnet pad again to re-start the join process on the sensor.
  • Try removing and re-installing the battery.

Sensor keeps beeping twice, then five times when quick tapped with a magnet

  • This beep sequence indicates that the sensor has a parent network remembered, but is not currently connected. It is attempting to leave the network, but is not succeeding (you will know when the sensor has successfully left its parent network, when a quick tap yields just one beep. This indicates that the sensor is ready to be joined).
  • Try long-pressing the magnet to the magnet with the magnet pad. The sensor should beep 5 times.  The “leave” routine is successful if a quick tap yields just one beep.
  • Try removing the battery and discharging it using the Battery reset instructions. 
    • After installing the battery, you should hear 1 beep
    • If the beep code is not a single beep, repeat the Battery reset instructions again until the beep code is 1 beep when inserting the battery in the correct polarization.

Battery reset instructions

  • In some cases, the battery may not respond as expected due to charge state. Use the steps below to quickly reset and discharge the sensor circuitry.
    1. Remove the battery from the sensor
    2. Very briefly (less than 1 second), insert the battery just halfway with the wrong polarization (so + facing into the board). Remove the battery as soon as you have inserting the battery roughly halfway – you don’t want to keep the battery installed in the wrong polarization for any substantial length of time.
    3. Insert the battery the correct way (+ facing away from the board).
    4. If the sensor beeped when the battery was inserted, try going through the normal steps of joining the sensor with the magnet.

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