User's Manual

MOBILE APPLICATION – POWERMON

The PowerMon device requires a mobile device running Thornwave Labs’ PowerMon app which is

available free of charge for both Android and iOS platforms and can be found on Google Play Store and Apple

App Store. The mobile device used needs to be equipped with a Bluetooth Smart (LE) adapter. The app will not

install on devices that are too old to support Bluetooth Smart (4.0).

PowerMon allows the following operations to be performed:

• scan for PowerMon devices and display a summary of measurements (voltage, temperature, battery

state of charge and power status)

• connect to devices and obtain real-time measurements

• set the device configuration (external shunt parameters, low voltage disconnect, high voltage disconnect

overcurrent disconnect, battery fuel gauge,… see the Configuration paragraph)

• zero the current reading offset

• calibrate the current reading

• rename the device

• reset the power and charge meters back to zero

• manually turn the power relay ON/OFF

• update the internal device clock from the mobile device current time and date

• create, edit and delete timers

• reset to factory defaults

• configure the password protection function

• update the device firmware (when new releases are published)

Scan for devices. The first screen that appears after PowerMon is launched is the scan screen. If the

mobile device Bluetooth adapter is not enabled PowerMon will prompt the user to enable it before continuing.

The app will then display all the PowerMon devices that are within range. Each advertisement packet contains

the device name, firmware version, the battery voltage and the device temperature. All this information will be

displayed by the app together with the device RSSI (Receiver Signal Strength Indication). The RSSI value is a

direct indicator of the signal strength received from a device. In most scenarios involving Bluetooth, this is a

negative number and is measured in dBm (decibel referenced to 1mW). Typical values range from -110dBm

being a very weak signal to -30dBm or better being a very strong signal. For a reliable connection, an RSSI of at

least -100dBm is required.