To connect the IoT SoundSensor™ download the LoRa Key and Monitor App from Google Play for network settings (LoRa keys) and connect the sound sensor to The Things Network.
1. Your local provider will deliver the LoRa network keys.
2. Download the LoRa Key and Monitor App from Google Play for LoRa network settings (LoRa keys) and connect the sound sensor to your privaye LoRa network.
You need a USB-B male to whichever USB connector your (Android) mobile phone is using. Most common at the moment is C male or Micro-B male.You need a USB-B male to the USB connector of your (Android) mobile phone to the IoT SoundSensor™. Most common at the moment is C male or Micro-B male.
A USB-B male to USB-C male cable is included.
We have developed a technical blueprint in which the IoT SoundSensor™ sends audio fragments via LTE-M. If you sign up for our newsletter we will keep you informed of this development.
1. You will need the following endpoint: https://gateway-dot-sensorteam-io.appspot.com/api/sensor/data/sound
2. The login details are sent securely by email after ordering the IoT SoundSensor™.
- € 12,50 per user account per month
- € 12,50 per sensor account per month
Nothing, you just need the (Android) app and under Support you will find all the information about the payload description and how to connect the sound sensor to any LoRa network.
Yes. The IoT SoundSensor™ is calibrated before shipping and comes with a factory calibration. Regular sound level calibrations can be done with a Calibrator. In Dashboard+ measurement deviations can be corrected.
The IoT SoundSensor’s frequency response is calibrated to be within +/- 2db at the factory, at the moment this can only be done by SensorTeam. Periodical sensitivity calibration can be done yourself with a standard calibrator which is coupled onto the microphone and produces a 1kHz tone at 94 or 114 dB(A/C). The sensitivity offset can be adjusted in the settings of the sensor in our dashboard.
No yet, The IoT SoundSensor™ is calibrated equal to class 2. This is according tot the calibration report.
On Wikipedia you will find more information about the meaning of different sound measurements and weighting.
Is the microphone of a standard diameter so that I can calibrate it with a normal portable sound calibrator?
Yes, the diameter of the microphone is 1/2″ and suitable for a normal portable sound calibrator.
Calibration is done via the cloud platform on any mobile device.
Yes, the calculation is completely separate
Are the time weighted levels ‘Fast’ and ‘Slow’ a single sample at the measurement interval (i.e. 1 minute shortest)?
Yes, both are a single sample of the measurement interval.
The IoT SoundSensor™ V3.02 has no RTC on board and the timestamp of the GPS is not always present, so we use the timestamp from the LoRa message itself. Not only national LoRa providers, but also TTN sends a timestamp in their message which can be used.
Hereby a link to the TTN forum: https://www.thethingsnetwork.org/forum/t/gateway-timestamps-in-uplink-metadata-how-calculated/23703/7
We do not buffer the measurement data locally on the sound sensor. Due to the maximum duty cycle we only can transmit once every minute.
Every message sent contains the maximum amount of data already. Meaning there wouldn’t be enough bandwidth left to send buffered data once the connection is restored.
The LoRa network is not suitable for sending large data packages such as WAV. That is why we only send the sound pressure in decibels every minute. We have, however, developed a technical blueprint in which the IoT SoundSensor™ sends audio fragments via LTE-M. If you sign up for our newsletter we will keep you informed of this development.
Currently we have one version of the sensor, which is meant for outdoor use. However, the IoT SoundSensor™ can be used indoor as well.
In order to use the IoT SoundSensor™ indoor slide the switch on the PCB from ”BAT” to ”USB” inside the sensor. Remove the impact cap on the right side of the sound sensor and connect the USB cable (included) with the USB-B female port. Power: 5V DC
The battery and solar panel will be switched off as a result.
Yes, body and microphone are 100% waterproof and weatherproof.
No, not yet (Android only).
The GPIO pins are not made available to be programmed by the user. We can program these upon request.
No, we are using an Atmel microcontroller with a LoRa module.