Merge pull request #6 from einergehtnochrein/master

Some more details on fields and blocks
bazjo · May 30, 2022 · 702553b · 702553b
2 parents 4db7e32 + fe3664c
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diff --git a/RS41-SGP+XDATA/README.md b/RS41-SGP+XDATA/README.md
@@ -46,7 +46,7 @@ The Measurement Data is 21 ASCII chars long.
 | `20` | ASCII char | `I` | I | ID Data Identifier |
 
 ## 7E-XDATA
-The XDATA block has a variable length and contains the ASCII characters received via XDATA, without the "xdata=" preambel. As no tests with more than one XDATA instrument have been conducted yet, nothing is known how multiple XDATA messages are sent.
+The XDATA block has a variable length and contains the ASCII characters received via XDATA, without the "xdata=" preamble. If more than one XDATA instrument is present, there can be multiple `7E-XDATA` blocks in one frame (the `76-EMPTY` block would shrink accordingly).
 
 ## Subframe
 There are no differences known between the regular subframe and the subframe with XDATA attached. There is no possibiltiy for XDATA instruments to send our there calibration values via the subframe.
diff --git a/RS41-SGP/README.md b/RS41-SGP/README.md
@@ -27,7 +27,7 @@ Also there is the Subframe, who is transmitted over 51 frames in pieces of 16 by
 | `[0x0A]` | uint8 | `0x1A` | 2.6 V | battery voltage * 10 |
 | `[0x0B]` | uint16 | `0x0000` | | Bit field. Purpose unknown |
 | `[0x0D]` | uint16 | `0x0003` | In flight mode, descending | Bit field.<br>**Bit 0**:  0=start phase, 1=flight mode<br>**Bit 1**: 0=ascent, 1=descent<br>**Bit 12**: 0=VBAT ok, 1=VBAT too low<br>Other bits t.b.d. |
-| `[0x0F]` | uint8 | `0x00` |  | Purpose unknown. Only 0 or 6 possible? |
+| `[0x0F]` | uint8 | `0x00` | Standard sonde | Crypto Mode.<br>**0**=Standard RS41-SG(P)<br>**1,2**=RS41-SGM unencrypted, sends all three GPS blocks (`7B-GPSPOS`, `7C-GPSINFO`, `7D-GPSRAW`), `7F-MEASSHORT` replaces `7A-MEAS`<br>**3,4**=RS41-SGM encrypted, encrypted block `80-CRYPTO` replaces `7F-MEASSHORT`, `7B-GPSPOS`, `7C-GPSINFO` and `7D-GPSRAW`<br>**6**=unknown, appears to indicate broken configuration |
 | `[0x10]` | uint8 | `0x15` | 21°C | Temperature of reference area (cut-out) on PCB |
 | `[0x11]` | uint16 | `0x0000` |  | Bit field (error flags).<br>t.b.d. |
 | `[0x13]` | uint16 | `0x005D` | 93 | PWM (0...1000) of humidity sensor heating |
@@ -39,7 +39,7 @@ Also there is the Subframe, who is transmitted over 51 frames in pieces of 16 by
 ## 7A-MEAS
 The 7A-MEAS block contains all the infomation about the PTU measurements.
 
-There are two temperature sensors in the sonde, on for the actual temperature and one on the heated humidity sensor. Those are PT1000. Additionally, there are cpacitive sensors for humidity and pressure. For each type of measurement, there are additional references.
+There are two temperature sensors in the sonde, one for the actual temperature and one on the heated humidity sensor. Those are PT1000. Additionally, there are capacitive sensors for humidity and pressure. For each type of measurement, there are additional references.
 
 What those values actually mean is still unclear, there are a few different formulas for calculating the temperature who are all a bit different. I hope to provide some more information about this at some point. In the meantime, check out [zilog80s](https://github.com/rs1729/RS/tree/master/rs41) code.
 
@@ -63,6 +63,23 @@ For the hardware side of things, which is also of interest here, take a look at
 | `[0x26]` | int16 | `0xFBFB` | 0xFBFB = -1029<br>-10.29°C | Temperature of pressure sensor module (1/100 °C) |
 | `[0x28]` |  | `0x0000` |  | static 0x00 -purpose unknown |
 
+## 7F-MEASSHORT
+The 7F-MEAS block contains all the infomation about the PTU measurements, but without the option for a pressure sensor. This block is used by RS41-SGM.
+
+See description of `7A-MEAS` for details.
+
+| address  | datatype | example data | decoded | function |
+| --- | --- | --- | --- | --- |
+| `[0x00]` | uint24 | `0xCF5202` | 152271 | Temperature Tempmeas Main |
+| `[0x03]` | uint24 | `0x2A0002` | 131114 | Temperature Tempmeas Ref1 |
+| `[0x06]` | uint24 | `0x9CE702` | 190364 | Temperature Tempmeas Ref2 |
+| `[0x09]` | uint24 | `0x278D08` | 560423 | Humidity Main |
+| `[0x0C]` | uint24 | `0xAF8707` | 493487 | Humidity Ref1 |
+| `[0x0F]` | uint24 | `0x479108` | 561479 | Humidity Ref2 |
+| `[0x12]` | uint24 | `0xCB2B02` | 142283 | Temperature Humimeas Main |
+| `[0x15]` | uint24 | `0x2B0002` | 131115 | Temperature Humimeas Ref1 |
+| `[0x18]` | uint24 | `0x9DE702` | 190365 | Temperature Humimeas Ref2 |
+
 ## 7C-GPSINFO
 The 7C-GPSINFO block contains GPS status information. It includes the GPS Week and Time of week as well as having twelve slots for SVNs (Space Vehicle Numbers, though whats transmitted are actually PRN#) with the according signal quality. What indication is used there is unknown. the [RS41 Tracker](http://escursioni.altervista.org/Radiosonde/) plots this value on a scale from 0 to 43, the corresponding values in the RS41 Tracker are in an additional column.
 
@@ -72,30 +89,30 @@ If there are less than 12 satellites tracked, the other slots are 0x00.
 | --- | --- | --- | --- | --- | --- |
 | `[0x00]` | uint16 | `0xE607` | 2022 |  | GPS Week |
 | `[0x02]` | uint32 | `0x18FB2512` | 304479000 ms |  | GPS Time of Week |
-| `[0x06]` | uint8 | `0x01` | 1 |  | Space Vehicle Number Slot 1 |
-| `[0x07]` | uint8 | `0xFB` | 251 | 42 | Quality Indicator Slot 1 |
-| `[0x08]` | uint8 | `0x11` | 17 |  | Space Vehicle Number Slot 2 |
-| `[0x09]` | uint8 | `0xF9` | 249 | 41 | Quality Indicator Slot 2 |
-| `[0x0A]` | uint8 | `0x13` | 19 |  | Space Vehicle Number Slot 3 |
-| `[0x0B]` | uint8 | `0xF3` | 243 | 39 | Quality Indicator Slot 3 |
-| `[0x0C]` | uint8 | `0x0B` | 11 |  | Space Vehicle Number Slot 4 |
-| `[0x0D]` | uint8 | `0xFA` | 250 | 42 | Quality Indicator Slot 4 |
-| `[0x0E]` | uint8 | `0x09` | 9 |  | Space Vehicle Number Slot 5 |
-| `[0x0F]` | uint8 | `0x92` | 146 | 6 | Quality Indicator Slot 5 |
-| `[0x10]` | uint8 | `0x16` | 22 |  | Space Vehicle Number Slot 6 |
-| `[0x11]` | uint8 | `0xF7` | 247 | 40 | Quality Indicator Slot 6 |
-| `[0x12]` | uint8 | `0x12` | 18 |  | Space Vehicle Number Slot 7 |
-| `[0x13]` | uint8 | `0xF7` | 247 | 40 | Quality Indicator Slot 7 |
-| `[0x14]` | uint8 | `0x03` | 3 |  | Space Vehicle Number Slot 8 |
-| `[0x15]` | uint8 | `0xFA` | 250 | 42 | Quality Indicator Slot 8 |
-| `[0x16]` | uint8 | `0x17` | 23 |  | Space Vehicle Number Slot 9 |
-| `[0x17]` | uint8 | `0xFA` | 250 | 42 | Quality Indicator Slot 9 |
-| `[0x18]` | uint8 | `0x1F` | 31 |  | Space Vehicle Number Slot 10 |
-| `[0x19]` | uint8 | `0xF4` | 244 | 40 | Quality Indicator Slot 10 |
-| `[0x1A]` | uint8 | `0x0E` | 14 |  | Space Vehicle Number Slot 11 |
-| `[0x1B]` | uint8 | `0xF4` | 244 | 40 | Quality Indicator Slot 11 |
-| `[0x1C]` | uint8 | `0x0C` | 12 |  | Space Vehicle Number Slot 12 |
-| `[0x1D]` | uint8 | `0x91` | 145 | 5 | Quality Indicator Slot 12 |
+| `[0x06]` | uint8 | `0x01` | PRN 1 |  | Space Vehicle Number Slot 1 |
+| `[0x07]` | uint8 | `0xFB` | mesQI=7<br>cno'=27<br>cno=47 dbHz | 42 | Quality Indicator Slot 1<br>32*mesQI + cno'<br>cno'=0 if cno < 20<br>cno'=cno-20 if 20 <= cno <= 50<br>cno'=31 if cno > 50<br>See u-blox6 RXM-RAW message description for details |
+| `[0x08]` | uint8 | `0x11` | PRN 17 |  | Space Vehicle Number Slot 2 |
+| `[0x09]` | uint8 | `0xF9` | mesQI=7<br>cno=45 dbHz | 41 | Quality Indicator Slot 2 |
+| `[0x0A]` | uint8 | `0x13` | PRN 19 |  | Space Vehicle Number Slot 3 |
+| `[0x0B]` | uint8 | `0xF3` | mesQI=7<br>cno=39 dbHz | 39 | Quality Indicator Slot 3 |
+| `[0x0C]` | uint8 | `0x0B` | PRN 11 |  | Space Vehicle Number Slot 4 |
+| `[0x0D]` | uint8 | `0xFA` | mesQI=7<br>cno=46 dbHz | 42 | Quality Indicator Slot 4 |
+| `[0x0E]` | uint8 | `0x09` | PRN 9 |  | Space Vehicle Number Slot 5 |
+| `[0x0F]` | uint8 | `0x92` | mesQI=4<br>cno=38 dbHz | 6 | Quality Indicator Slot 5 |
+| `[0x10]` | uint8 | `0x16` | PRN 22 |  | Space Vehicle Number Slot 6 |
+| `[0x11]` | uint8 | `0xF7` | mesQI=7<br>cno=43 dbHz | 40 | Quality Indicator Slot 6 |
+| `[0x12]` | uint8 | `0x12` | PRN 18 |  | Space Vehicle Number Slot 7 |
+| `[0x13]` | uint8 | `0xF7` | mesQI=7<br>cno=43 dbHz | 40 | Quality Indicator Slot 7 |
+| `[0x14]` | uint8 | `0x03` | PRN 3 |  | Space Vehicle Number Slot 8 |
+| `[0x15]` | uint8 | `0xFA` | mesQI=7<br>cno=46 dbHz | 42 | Quality Indicator Slot 8 |
+| `[0x16]` | uint8 | `0x17` | PRN 23 |  | Space Vehicle Number Slot 9 |
+| `[0x17]` | uint8 | `0xFA` | mesQI=7<br>cno=46 dbHz | 42 | Quality Indicator Slot 9 |
+| `[0x18]` | uint8 | `0x1F` | PRN 31 |  | Space Vehicle Number Slot 10 |
+| `[0x19]` | uint8 | `0xF4` | mesQI=7<br>cno=40 dbHz | 40 | Quality Indicator Slot 10 |
+| `[0x1A]` | uint8 | `0x0E` | PRN 14 |  | Space Vehicle Number Slot 11 |
+| `[0x1B]` | uint8 | `0xF4` | mesQI=7<br>cno=40 dbHz | 40 | Quality Indicator Slot 11 |
+| `[0x1C]` | uint8 | `0x0C` | PRN 12 |  | Space Vehicle Number Slot 12 |
+| `[0x1D]` | uint8 | `0x91` | mesQI=4<br>cno=37 dbHz | 5 | Quality Indicator Slot 12 |
 
 ## 7D-GPSRAW
 The 7D-GPSRAW block contains the raw doppler shift GPS data to decode the GPS Position in a similar way as with the old RS92. This Data is for the most part not neccesary.
@@ -151,6 +168,16 @@ The 7B-GPSPOS block contains the actual position of the sonde in the ECEF format
 ## 76-EMPTY
 The 76-EMPTY block just contains a variable amount of zeros to fill up some space.
 
+## 80-CRYPTO
+The 80-CRYPTO block (167 bytes) contains the payload of the `7F-MEASSHORT` (27 bytes), `7B-GPSPOS` (21 bytes), `7C-GPSINFO` (30 bytes) and `7D-GPSRAW` (89 bytes) blocks in encrypted form (Rabbit cipher).
+
+| address  | datatype |
+| --- | --- |
+| `[0x00...0x1A]` | 7F-MEASSHORT payload |
+| `[0x1B...0x38]` | 7C-GPSINFO payload |
+| `[0x39...0x91]` | 7D-GPSRAW payload |
+| `[0x92...0xA6]` | 7B-GPSPOS payload |
+
 ## Subframe
 The subframe consist of 51 \* 16 = 816 Bytes. It is mostly static, but some parts, for example the last 16 bytes, change quite a lot as is discussed in the section about the RS41-SGMs subframe.
 
@@ -208,3 +235,19 @@ Frequency is calculated by the formula `freq = 400 MHz + (freq upper + (freq low
 | `[0x22C]` | char[10] | "P2510419 " | mainboard serial |
 | `[0x243]` | char[10] | "P2670962  " | pressure  serial |
 | `[0x316]` | uint16 | 30600 s | burstkill timer |
+
+### Run-time variable fields (0x320...0x32D)
+Fields 0x32E...0x32F are not used by RS41!
+
+| address  | datatype | function |
+| --- | --- | --- |
+| `[0x320]` | int16 | frames remaining untill kill (-1 = 0xFFFF = inactive) |
+| `[0x322]` | int16 | launch altitude [m], referenced to spherical earth model (R=6371.008 km) |
+| `[0x324]` | uint16 | height [m] above launch site where transition to flight mode happened |
+| `[0x326]` | uint8 | ? (power level) |
+| `[0x327]` | uint8 | ? (# software resets) |
+| `[0x328]` | int8 | CPU temperature [°C] |
+| `[0x329]` | int8 | Radio (Si4032) temperature [°C] |
+| `[0x32A]` | uint16 | Remaining battery capacity |
+| `[0x32C]` | uint8 | Number of discarded UBX (GPS) packets |
+| `[0x32D]` | uint8 | Number of occasions when essential UBX (GPS) packets were missing |