PEGASUS ASTRO PEG-URANUS Uranus Meteo Sensor User Manual

Uranus Meteo Sensor
COMMAND PROTOCOL
COMPATIBLE WITH FIRMWARE ≤ V1.2 

VERSION HISTORY

INTRODUCTION

Thank you for purchasing the Uranus Meteo Sensor. This pocket-sized device is an all-around astronomer, astroimager companion. Smaller than the size of a cigarette box, and equipped with a variety of digital sensors, can precisely report the ambient temperature, humidity, pressure, cloud height, cloud coverage, astronomical dawn, twilight time, and the night sky brightness.

COMMUNICATION CHANNEL

A USB to Serial interface allows communication with the device. Plug in the USB-C cable to discover the device.
Note1: The device remains open and ignores any configured sleep time when the USB cable is plugged in.
Note 2: Display turns off during Sky Quality measurements.
Device USB Name is: Uranus Meteo
Device USB discovery ID is:

Serial connection parameters are:

COMMANDS

• All commands are case-sensitive.
• Each command is a string of characters. The beginning command string consists of two ASCII characters plus ‘:’ followed by the message.
• Command ends with a CRLF.

E.g.:
Send: => GO
Receive: <= GO:[value]:CRLF

UNIT SYSTEM
All units outputted from the USB to Serial channel are in the metric system.
ABBREVIATIONS

COMMAND LIST

1.1 General

M#| Get the health status of the device – Acknowledgment that the device is operational.
Returns:
MS_OK
---|---
MV| Get the firmware release
Returns: (double)
MV:n.n
MQ:| Device MCU reset
Returns:
Nothing
SR| Serial Number of the device
Returns: (16 char hex string)
SR:xxxxxxxxxxxxxxxx

1.2 Sensors

MA| Combined sensor report
Returns:
MS_OK:value:value:value:…
---|---
1| Ambient temperature in °C| n.n
---|---|---
2| Relative Humidity %| n
3| Dew Point in °C| n.n
4| Absolute (Station) Pressure (hPa) [300-1250 hPa]| n.n
5| Relative (Sea Level) Pressure (hPa) [300-1250 hPa]| n.n
6| Barometric Altitude (m)
When GPS fix is 0, altitude is barometric altitude When GPS fix is 1, altitude is real GPS altitude| n.n
7| Sky temperature in °C| n.n
8| Infrared sensor temperature in °C| n.n
9| Battery usage – ignore
0 is battery, 1 is USB cable
(As the device is on USB power it always reports 1)| b
10| Battery voltage (in volts) – ignore (e.g 4.60)
As the device is on USB power it reports USB channel voltage.| n.nn
SQ:1| Initiates a Sky Quality Sensor Measurement
Returns: (string)
SQ:MSR
---|---
SQ| Reports last Sky Quality measurement values
Returns:
SQ:value:value…
1| MPSAS (mag/arcsec2)| n.n
---|---|---
2| Naked Eye Magnitude limit (NELM in mags)| n.n
3| Full spectrum raw value| n
4| Visual spectrum raw value| n
5| Infrared spectrum raw value| n

BR
Reset Bosch BME Sensor
Returns:
Nothing
CI
Cloud Index Report
Returns:
CI:value:value…

1.00] The default configured value is 1.00, Human Body is 0.98 The setting is saved in the sensor’s memory
A device restart is recommended in case of wrong values from the sensor.| n.n

1.3 GPS
GP
GPS Information
Returns:
GP:value:value:value:…

1| GPS fix status 0 = no fix
3 = 3d fix| n
---|---|---
2| GPS time (in UNIX time epoch)| n
3| Timezone offset
(should include daylight savings)| n
4| Latitude (in degrees)| n.n
5| Longitude (in degrees)| n.n
6| Satellite Number
[how many satellites are fixed] [ requires at least 4 satellites for a 3d fix position]| n
7| GPS speed (in kph)| n
8| Bearing (in degrees)| n (0-359)

GO
GPS NMEA Output (RJ12 output at the side of Uranus device)
Returns: (boolean)
GO:n [0 is disabled, 1 is disabled] 1.4 Astronomical Calculations
MP
Moon information
Returns:
MP:value:value:value

AS
Astro Sunrise and Sunset
Returns:
AS:value:value:value

1| Sunrise time astronomical sunrise in fractional minutes past midnight (in local time)| n.nn
---|---|---
2| Sunset time (in seconds after midnight) astronomical sunset in fractional minutes past midnight (in local time)| n.nn
3| Moon Phase| n

1.5 Config
CF
Config Read
Returns:
CF:value:value..

This has an effect only to the device display, all serial units are metric Returns: (boolean)
C1:n
0 is metric, 1 is imperial
---|---
C2| Config – Sleep after n minutes [0-30] 0 is disabled, any other value is in minutes
Returns: (int)
C2:n
C3| Config – UTC offset
Shows the configured UTC offset. Offset is required for GPS local time calculation and astronomical calculations.
Always include extra daylight-saving hour when you set this offset.
Returns:
C3:n
0 is metric, 1 is imperial
C4| Config – Sky Quality MPSAS Calibration offset
Returns:
C4:n
0 is metric, 1 is imperial
C5| Config – Time zone id
This is for the Unity Platform Dotnet time zone identification – ignore for any other usage
Returns:
C5:n
0 is metric, 1 is imperial
C6| Config – OLED On / Off
Returns:
C6:n
0 is metric, 1 is imperial
CE:| Get Infrared Sensor Emissivity
From 0-100.
Returns: (integer)
CE:n
CE:n| Set Infrared Sensor Emissivity 100 for sky measurement (default) 98 for human skin measurement
Returns: (integer) CE:n

1.6 Memory Banks

MW| Memory Write
Stores latest sensor value readout to the next available memory bank Returns:
MW:n  0 is fail, 1 is success
---|---
MN| Memory Number
Reads how many bank records are used and what is the increased (last) record since the first operation of the Uranus device.
Returns: (long)
MN:n
MZ| Memory Banks Erase
This command practically erases all memory banks and starts from bank number 1
Returns:
MZ:n 0 is fail, 1 is success
MR| Memory Banks Read
Returns:
MR:value:value:value:….
1| Record count of readout list (long)| n
---|---|---
2| Unique id (long)| n
3| Timezone| n
4| GPS fix| n
5| Unix_time (epoc unixtime)| n
6| Latitude (in decimal format)| n.n
7| Longitude (in decimal format)| n.n
8| Temperature °C| n.n
9| Humidity %| n
10| Altitude (m)| N
11| Pressure (station) in hPa| n.n
12| Sky quality (MPSAS) in mag/arcsec2| n.n
13| Cloud index %| n

Pegasus Astro
DOCUMENT VERSION 1.1 – 2022-NOV-01

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