REST API

All the API’s use a key called ID which is the unique device id (chip id). This is used as an API key when sending requests to the device.

GET: /api/config

Retrieve the current configuration of the device via an HTTP GET command. Payload is in JSON format.

• temp-format can be either C or F

• gravity-format is always G (plato is not yet supported)

• ble is used to enable ble data transmission (only on esp32) simulating a tilt. Valid color names are; red, green, black, purple, orange, blue, yellow, pink

Other parameters are the same as in the configuration guide.

{
   "mdns": "gravmon",
   "id": "ee1bfc",
   "ota-url": "http://192.168.1.50:80/firmware/gravmon/",
   "temp-format": "C",
   "ble": "color",
   "token": "token",
   "token2": "token2",
   "http-push": "http://192.168.1.50:9090/api/v1/Qwerty/telemetry",
   "http-push-h1": "header: value",
   "http-push-h2": "header: value",
   "http-push2": "http://192.168.1.50/ispindel",
   "http-push2-h1": "header: value",
   "http-push2-h2": "header: value",
   "http-push3": "http://192.168.1.50/ispindel",
   "influxdb2-push": "http://192.168.1.50:8086",
   "influxdb2-org": "org",
   "influxdb2-bucket": "bucket_id",
   "influxdb2-auth": "token",
   "mqtt-push": "192.168.1.50",
   "mqtt-port": 1883,
   "mqtt-user": "user",
   "mqtt-pass": "pass",
   "sleep-interval": 30,
   "voltage-factor": 1.59,
   "gravity-formula": "0.0*tilt^3+0.0*tilt^2+0.0017978*tilt+0.9436",
   "gravity-format": "G",
   "temp-adjustment-value": 0,
   "gravity-temp-adjustment": false,
   "gyro-temp": true,
   "gyro-calibration-data": {
      "ax": -330,
      "ay": -2249,
      "az": 1170,
      "gx": 99,
      "gy": -6,
      "gz": 4
   },
   "formula-calculation-data": {
      "a1":25,
      "a10":0,
      "g1":1,
      "g10":1
   },
   "angle": 90.93,
   "gravity": 1.105,
   "battery": 0.04,
   "app-ver": "0.1.0",
   "app-build": "build",
   "platform": "esp8266",
   "runtime-average": 3.12
}

GET: /api/device

This API has been removed from 0.9 and merged with /api/status

GET: /api/status

Retrieve the current device status via an HTTP GET command. Payload is in JSON format.

• temp-format can be either C or F

• platform can be either esp8266, esp32c3, esp32s2, esp32s3, esp32 or esp32lite (floaty hardware)

• temp-c will be set to -273 C if there is no temp sensor

• angle will be set to 0 if no valid angle is found and -1 if there is no gyro

Other parameters are the same as in the configuration guide.

{
   "id": "ee1bfc",
   "angle": 89.86,
   "gravity": 1.1052,
   "temp-c": 0,
   "temp-f": 32,
   "battery": 0,
   "wifi-ssid": "connected SSID",
   "temp-format": "C",
   "sleep-mode": false,
   "token": "token",
   "token2": "token2",
   "rssi": -56,
   "app-ver": "0.0.0",
   "app-build": "gitrev",
   "mdns": "gravmon",
   "sleep-interval": 30,
   "platform": "esp8266",
   "runtime-average": 3.12
}

GET: /api/config/formula

Retrieve the data used for formula calculation data via an HTTP GET command. Payload is in JSON format.

• a1-a10 are the angles/tilt readings (up to 10 are currently supported)

• g1-g10 are the corresponding gravity readings in SG or Plato depending on the device-format.

{
   "id": "ee1bfc",
   "a1": 22.4,
   "a2": 54.4,
   "a3": 58,
   "a4": 0,
   "a5": 0,
   "a6": 0,
   "a7": 0,
   "a8": 0,
   "a9": 0,
   "a10": 0,
   "g1": 1.000,
   "g2": 1.053,
   "g3": 1.062,
   "g4": 1,
   "g5": 1,
   "g6": 1,
   "g7": 1,
   "g8": 1,
   "g9": 1,
   "g10": 1,
   "error": "Potential error message",
   "gravity-format": "G",
   "gravity-formula": "0.0*tilt^3+0.0*tilt^2+0.0017978*tilt+0.9436"
}

GET: /api/config/advanced

Used for adjusting some internal constants and other advanced settings. Should be used with caution.

{
   "gyro-read-count": 50,
   "gyro-moving-threashold": 500,
   "formula-max-deviation": 3.0,
   "wifi-portal-timeout": 120,
   "wifi-connect-timeout": 20,
   "push-timeout": 10,
   "formula-calibration-temp": 20,
   "int-http1": 0,
   "int-http2": 0,
   "int-http3": 0,
   "int-influx": 0,
   "int-mqtt": 0,
   "tempsensor-resolution": 9,
   "ignore-low-angles": false
}

POST: /api/config/advanced

Same parameters as above.

Payload should be in standard format used for posting a form.

Note

ignore-low-angles is defined as “on” or “off” when posting since this is the output values from a checkbox, when reading data it’s sent as boolean (true,false).

GET: /api/clearwifi

Will reset the wifi settings both in the configuration file and eeprom, leaving the rest of the configuration.

For this to work you will need to supply the device id as a parameter in the request:

http://mygravity.local/api/clearwifi?id=<mydeviceid>

GET: /api/factory

Will do a reset to factory defaults and delete all data except wifi settings.

For this to work you will need to supply the device id as a parameter in the request:

http://mygravity.local/api/factory?id=<mydeviceid>

GET: /api/test/push

Trigger a push on one of the targets, used to validate the configuration from the UI.

Requires to parameters to function /api/test/push?id=<deviceid>&format=<format>

• format defines which endpoint to test, valid values are; http-1, http-2, http-3, influxdb, mqtt

The response is an json message with the following values.

• code is the return code from the push function, typically http responsecode or error code from mqtt library.

{
   "success": false,
   "enabled": true,
   "code": -3
}

POST: /api/config/device

Used to update device settings via an HTTP POST command.

Payload should be in standard format used for posting a form. Such as as: id=value&mdns=value etc. Key value pairs are shown below.

• temp-format can be either C (Celsius) or F (Fahrenheit)

id=ee1bfc
mdns=gravmon
temp-format=C
sleep-interval=30

POST: /api/config/push

Used to update push settings via an HTTP POST command. Payload is in JSON format.

Payload should be in standard format used for posting a form. Such as as: id=value&mdns=value etc. Key value pairs are shown below.

id=ee1bfc
token=
token2=
http-push=http://192.168.1.50/ispindel
http-push2=
http-push3=
http-push-h1=
http-push-h2=
http-push2-h1=
http-push2-h2=
influxdb2-push=http://192.168.1.50:8086
influxdb2-org=
influxdb2-bucket=
influxdb2-auth=
mqtt-push=192.168.1.50
mqtt-port=1883
mqtt-user=
mqtt-pass=

POST: /api/config/gravity

Used to update gravity settings via an HTTP POST command. Payload is in JSON format.

• gravity-formula keywords temp and tilt are supported.

• gravity-format can be either G (SG) or P (PLATO)

Note

gravity-temp-adjustment is defined as “on” or “off” when posting since this is the output values from a checkbox, when reading data it’s sent as boolean (true,false).

Payload should be in standard format used for posting a form. Such as as: id=value&mdns=value etc. Key value pairs are shown below.

id=ee1bfc
gravity-formula=0.0*tilt^3+0.0*tilt^2+0.0017978*tilt+0.9436,
gravity-format=P
gravity-temp-adjustment=off

POST: /api/config/hardware

Used to update hardware settings via an HTTP POST command. Payload is in JSON format.

Note

gyro-temp is defined as “on” or “off” when posting since this is the output values from a checkbox, when reading data it’s sent as boolean (true,false).

Payload should be in standard format used for posting a form. Such as as: id=value&mdns=value etc. Key value pairs are shown below.

id=ee1bfc
voltage-factor=1.59
temp-adjustment=0
ble=red
gyro-temp=off
ota-url=http://192.168.1.50/firmware/gravmon/

POST: /api/config/formula

Used to update formula calculation data via an HTTP POST command. Payload is in JSON format.

• a1-a10 are the angles/tilt readings (up to 10 are currently supported)

• g1-g10 are the corresponding gravity readings (in SG)

Payload should be in standard format used for posting a form. Such as as: id=value&mdns=value etc. Key value pairs are shown below.

id=ee1bfc
a1=22.4
a2=54.4
a3=58
a4=0
a5=0
a6=0
a7=0
a8=0
a9=0
a19=0
g1=1.000
g2=1.053
g3=1.062
g4=1
g5=1
g6=1
g7=1
g8=1
g9=1
g10=1

Calling the API’s from Python

Here is some example code for how to access the API’s from a python script. Keys should always be present or the API call will fail. You only need to include the parameters you want to change.

The requests package converts the json to standard form post format.

import requests
import json

host = "192.168.1.1"           # IP address (or name) of the device to send these settings to
id = "ee1bfc"                  # Device ID (shown in serial console during startup or in UI)

def set_config( url, json ):
   headers = { "ContentType": "application/json" }
   print( url )
   resp = requests.post( url, headers=headers, data=json )
   if resp.status_code != 200 :
      print ( "Failed "  )
   else :
      print ( "Success "  )

url = "http://" + host + "/api/config/device"
json = { "id": id,
         "mdns": "gravmon",             # Name of the device
         "temp-format": "C",            # Temperature format C or F
         "sleep-interval": 30           # Sleep interval in seconds
      }
set_config( url, json )

url = "http://" + host + "/api/config/push"
json = { "id": id,
         "token": "",
         "token2": "",
         "http-push": "http://192.168.1.1/ispindel",
         "http-push2": "",
         "http-push3": "",
         "http-push-h1": "",
         "http-push-h2": "",
         "http-push2-h1": ""
         "http-push2-h2": "",
         "influxdb2-push": "",
         "influxdb2-org": "",
         "influxdb2-bucket": "",
         "influxdb2-auth": "",
         "mqtt-push": "192.168.1.50",
         "mqtt-port": 1883,
         "mqtt-user": "Qwerty",
         "mqtt-pass": "Qwerty"
         }
set_config( url, json )

url = "http://" + host + "/api/config/gravity"
json = { "id": id,
         "gravity-formula": "",
         "gravity-format": "P",
         "gravity-temp-adjustment": "off"        # Adjust gravity (on/off)
         }
set_config( url, json )

url = "http://" + host + "/api/config/hardware"
json = { "id": id,
         "voltage-factor": 1.59,                 # Default value for voltage calculation
         "temp-adjustment": 0,                   # If temp sensor needs to be corrected
         "gyro-temp": "on",                      # Use the temp sensor in the gyro instead (on/off)
         "ble": "red",                           # Enable ble on esp32
         "ota-url": ""                           # if the device should search for a new update when active
      }
set_config( url, json )

url = "http://" + host + "/api/formula"
json = { "id": id,
         "a1": 22.4,
         "a2": 54.4,
         "a3": 58,
         "a4": 0,
         "a5": 0,
         "a6": 0,
         "a7": 0,
         "a8": 0,
         "a9": 0,
         "a10": 0,
         "g1": 1.000,
         "g2": 1.053,
         "g3": 1.062,
         "g4": 1,
         "g5": 1,
         "g6": 1,
         "g7": 1,
         "g8": 1,
         "g9": 1,
         "g10": 1
         }
set_config( url, json )