Gateway

Note

This documentation reflects v0.7.0 beta 1. Last updated 2025-04-18

GravityMon Gateway is an separate project that can act as a proxy between your GravityMon/Pressuremon devices and services. It can:

  • Receive the new GravityMon 2.0 BLE formats

  • Receive the new PressureMon 0.5 BLE formats

  • Receive the new Chamber Controller 0.4 BLE formats

  • Receive data via direct WiFi connection (http post).

Hardware

The main supported hardware is ESP32s3 PRO with a TFT

Other option is the integrated waveshare board

There is also a build for the ESP32 PRO (Tiltbridge Hardware setup) but that does not support the new BLE formats since that board does not have BLE 5 support.

3d printable cases for the build

Most of the UI is copied from GravityMon with a few alterations so the documentation here will only point out the differences.

Note

GravityMon Gateway does not support the TILT options. It will receive those but not forward these to other services. If you want to use these I recommend Tiltbridge that has a lot of good features for that. The main reason is that these formats have very little data and would require a lot of work to make the gateway add the missing information. Tiltbridge already has this support built in so it makes little sense to replicate that work.

Home page

URL: (http://gravmon-gw.local)

Home page

The main page shows the device settings as well as the latest readings from connected devices.

Device

Device - Settings

Device Settings

  • MDNS:

    This is unique name for the device. It will be used in pushing data as well as mDNS name on the network (<name>.local). The limitation is 63 chars but using long names might break endpoints that data is sent to if they have other limitations.

  • Temperature format:

    Choose between Celsius and Fahrenheit when displaying temperature.

  • Gravity format:

    Gravity format can be either SG or Plato. The device will use SG Internally and convert to Plato when displaying or sending data.

  • Pressure format:

    Pressure format can be either PSI, kPa or Bar. The device will use PSI Internally and convert to other formats when displaying or sending data.

  • Dark Mode:

    Switches the UI between light and dark mode. You can also use the toggle on the menubar for that.

  • Factory default

    This function will reset all settings to factory default. Use with caution!

  • Restart

    Restarts the device, similar to pressing the reset button

Device - Hardware

Device Hardware

  • Enable Bluetooth:

    Enable to disable BLE scanning.

  • Scan mode:

    Determine if the BLE scan will be done in active or passive mode.

  • Scan time:

    Time the BLE scan cycle. Don’t use too long time since this will impact the updates on readings and display.

  • Time zone:

    Select the timezone so that date / time will be correcly displayed. This is not an extensive list of all timezones so let me know if you are missing one.

Device - WIFI

Device WIFI

Most of these settings are the same as for GravityMon with the following expections.

  • Direct SSID:

    Name of the SSID that GravityMon devices will use in Wifi Direct mode.

  • Direct Password:

    Enter the SSID password.

  • Generate:

    Will create an SSID and Password

Push targets

Push - Settings

Push Settings

  • Token:

    If the incoming payload does not contain the token this value will be added to the outgoing payload.

  • Push timeout:

    How long the device will wait for a connection accept from the remote service.

  • Push minium resend time:

    This the minimum time before an update can be sent. Some remote services do not want to have updates too often.

Push - HTTP Post

HTTP Post

Most of the settings are the same for Gravitymon but with the extension to handle both pressure and gravity data for the same endpoint. Based on what data is received the gateway will choose the correct template for that data. You can also disable gravity/pressure data for each endpoint.

Push - HTTP Get

See GravityMon configuration.

Push - InfluxDB v2

See GravityMon configuration.

Push - MQTT

See GravityMon configuration.

Other

Other - Serial

See GravityMon configuration.

Other - Backup

See GravityMon configuration.

Other - Firmware

See GravityMon configuration.

Other - Support

See GravityMon configuration.

Other - Tools

See GravityMon configuration.

Other - About

Shows information about the software