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.gitattributes
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CMakeLists.txt
CMakeLists.txt
 
 
LICENSE.txt
LICENSE.txt
 
 
README.md
README.md
 
 
VictronBTLELogger.sln
VictronBTLELogger.sln
 
 
VictronBTLELogger.vcxproj
VictronBTLELogger.vcxproj
 
 
extra-manufacturer-data-2022-12-14.pdf
extra-manufacturer-data-2022-12-14.pdf
 
 
postinst
postinst
 
 
postrm
postrm
 
 
prerm
prerm
 
 
victron-CEA5D77BCD81-day.svg
victron-CEA5D77BCD81-day.svg
 
 
victron-CEA5D77BCD81-month.svg
victron-CEA5D77BCD81-month.svg
 
 
victron-CEA5D77BCD81-week.svg
victron-CEA5D77BCD81-week.svg
 
 
victron-CEA5D77BCD81-year.svg
victron-CEA5D77BCD81-year.svg
 
 
victron-D3D19054EBF0-day.svg
victron-D3D19054EBF0-day.svg
 
 
victron-D3D19054EBF0-month.svg
victron-D3D19054EBF0-month.svg
 
 
victron-D3D19054EBF0-week.svg
victron-D3D19054EBF0-week.svg
 
 
victron-D3D19054EBF0-year.svg
victron-D3D19054EBF0-year.svg
 
 
victronbtlelogger-version.h.in
victronbtlelogger-version.h.in
 
 
victronbtlelogger.cpp
victronbtlelogger.cpp
 
 
victronbtlelogger.service
victronbtlelogger.service
 
 
wimiso8601.cpp
wimiso8601.cpp
 
 
wimiso8601.h
wimiso8601.h
 
 

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VictronBTLELogger

Recieve Victron Bluetooth LE advertisments. Decrypt and log data by bluetooth address. Create SVG graphs of battery voltage and temperature in the style of https://github.com/wcbonner/GoveeBTTempLogger

Currently graphing SmartLithium Battery and Orion XS DC/DC Charger.

Example SVG Output

Image Image Image Image Image Image Image Image

Quick Build Instructions

sudo apt install build-essential cmake git libdbus-1-dev libssl-dev
git clone https://github.com/wcbonner/VictronBTLELogger.git
cmake -S VictronBTLELogger -B VictronBTLELogger/build
cmake --build VictronBTLELogger/build
pushd VictronBTLELogger/build && cpack . && popd

Create file /etc/victronbtlelogger/victronencryptionkeys.txt in the following format using encryption keys captured from the VictronConnect App

CE:A5:D7:7B:CD:81  D9AB754E122C1234567890252795729F
F9:48:CF:18:57:62  18C16EB18D3B12345678908B10B9140C

2026-02-12 /dev/rfkill support

I added support for /dev/rfkill to be able to automatically unblock rfkill. The user is now added to the netdev group which should give access to /dev/rfkill. If the user is not in the netdev group, or if rfkill is blocked, the program will attempt to unblock rfkill by writing "1" to /dev/rfkill. This should unblock all rfkill devices, including bluetooth. If this fails, the program will continue and attempt to read bluetooth data, which will likely fail until rfkill is unblocked manually.

Useful starting links

https://community.victronenergy.com/questions/187303/victron-bluetooth-advertising-protocol.html

https://www.victronenergy.com/live/open_source:start

https://github.com/keshavdv/victron-ble

DBus

I'm using the same dbus connection style to BlueZ I recently learned in my Govee project. This project does not link to bluetooth libraries directly. I've duplicated a couple of functions for handling bluetooth address structures safely.

#include <iomanip>
#include <iostream>
#include <regex>

#ifndef bdaddr_t
  /* BD Address */
  typedef struct {
    uint8_t b[6];
  } __attribute__((packed)) bdaddr_t;
#endif // !bdaddr_t
bool operator <(const bdaddr_t& a, const bdaddr_t& b)
{
  unsigned long long A = a.b[5];
  A = A << 8 | a.b[4];
  A = A << 8 | a.b[3];
  A = A << 8 | a.b[2];
  A = A << 8 | a.b[1];
  A = A << 8 | a.b[0];
  unsigned long long B = b.b[5];
  B = B << 8 | b.b[4];
  B = B << 8 | b.b[3];
  B = B << 8 | b.b[2];
  B = B << 8 | b.b[1];
  B = B << 8 | b.b[0];
  return(A < B);
}
bool operator ==(const bdaddr_t& a, const bdaddr_t& b)
{
  unsigned long long A = a.b[5];
  A = A << 8 | a.b[4];
  A = A << 8 | a.b[3];
  A = A << 8 | a.b[2];
  A = A << 8 | a.b[1];
  A = A << 8 | a.b[0];
  unsigned long long B = b.b[5];
  B = B << 8 | b.b[4];
  B = B << 8 | b.b[3];
  B = B << 8 | b.b[2];
  B = B << 8 | b.b[1];
  B = B << 8 | b.b[0];
  return(A == B);
}
std::string ba2string(const bdaddr_t& TheBlueToothAddress)
{
  std::ostringstream oss;
  for (auto i = 5; i >= 0; i--)
  {
    oss << std::hex << std::uppercase << std::setw(2) << std::setfill('0') << static_cast<int>(TheBlueToothAddress.b[i]);
    if (i > 0)
      oss << ":";
  }
  return (oss.str());
}
const std::regex BluetoothAddressRegex("((([[:xdigit:]]{2}:){5}))[[:xdigit:]]{2}");
bdaddr_t string2ba(const std::string& TheBlueToothAddressString)
{ 
  bdaddr_t TheBlueToothAddress({ 0 });
  if (std::regex_match(TheBlueToothAddressString, BluetoothAddressRegex))
  {
    std::stringstream ss(TheBlueToothAddressString);
    std::string byteString;
    int index(5);
    // Because I've verified the string format with regex I can safely run this loop knowing it'll get 6 bytes
    while (std::getline(ss, byteString, ':'))
      TheBlueToothAddress.b[index--] = std::stoi(byteString, nullptr, 16);
  }
  return(TheBlueToothAddress); 
}

OpenSSL

I had to learn to use OpenSSL to decrypt the AES CTR blocks that are being sent by Victron. This was very quick and dirty, but works.

#include <openssl/evp.h> // sudo apt install libssl-dev

uint8_t DecryptedData[32] { 0 };
if (sizeof(DecryptedData) >= (ManufacturerData.size() - 8)) // simple check to make sure we don't buffer overflow
{
  EVP_CIPHER_CTX* ctx = EVP_CIPHER_CTX_new();
  if (ctx != 0)
  {
    uint8_t InitializationVector[16] { ManufacturerData[5], ManufacturerData[6], 0}; // The first two bytes are assigned, the rest of the 16 are padded with zero

    if (1 == EVP_DecryptInit_ex(ctx, EVP_aes_128_ctr(), NULL, EncryptionKey.data(), InitializationVector))
    {
      int len(0);
      if (1 == EVP_DecryptUpdate(ctx, DecryptedData, &len, ManufacturerData.data() + 8, ManufacturerData.size() - 8))
      {
        if (1 == EVP_DecryptFinal_ex(ctx, DecryptedData + len, &len))
        {
          // We have decrypted data!
          ManufacturerData[5] = ManufacturerData[6] = ManufacturerData[7] = 0; // I'm writing a zero here to remind myself I've decoded the data already
          for (auto index = 0; index < ManufacturerData.size() - 8; index++) // copy the decoded data over the original data
            ManufacturerData[index+8] = DecryptedData[index];
        }
      }
    }
    EVP_CIPHER_CTX_free(ctx);
  }
}

Victron Extra Manufacturer Data

Victron refers to Extra Manufacturer Data. It's all manufacturer data at the bluetooth level. What Victron refers to as "Extra Manufacturer Data" starts at the 8th byte of the manufacturer data, and runs to the end of the Bluetooth Manufacturer Data record. Decoding the extra manufacturer data, Victron bit packs the extra data before encrypting it using the AES CTR method.

Manufacturer Data

Start Byte Byte Count Meaning Remark
0 1 Manufacturer Data Record type 0x10=Product Advertisement
1 2 model id
3 1 read out type 0xA0
4 1 record type Used to decide which bit packed structure to decode the extra data. e.g. 0x01=Solar Charger 0x05=SmartLithium
5 2 AES Initialization Vector two bytes, pad with 14 more 0x00 values to have a 16 byte array. sometimes called "nonce"
7 1 First Byte of AES Decryption Key If this doesn't match the stored key, skip attempting to decode
8 ? First Byte of encrypted data Extra Manufacturer Data

Victron Data Structures (Extra Manufacturer Data)

Solar Charger (0x01)

Start Bit Nr of Bits Meaning Units Range NA Value Remark
0 8 Device state 0..0xFE 0xFF VE_REG_DEVICE_STATE
8 8 Charger Error 0..0xFE 0xFF VE_REG_CHR_ERROR_CODE
16 16 Battery voltage 0.01V -327.68..327.66 V 0x7FFF VE_REG_DC_CHANNEL1_VOLTAGE
32 16 Battery current 0.1A -3276.8..3276.6 A 0x7FFF VE_REG_DC_CHANNEL1_CURRENT Also negative current because of a possibly connected load
48 16 Yield today 0.01kWh 0..655.34 kWh 0xFFFF VE_REG_CHR_TODAY_YIELD 655.34 kWh is 27.3 kW@24h
64 16 PV power 1W 0..65534 W 0xFFFF VE_REG_DC_INPUT_POWER (un32 @ 0.01W)
80 9 Load current 0.1A 0..51.0 A 0x1FF VE_REG_DC_OUTPUT_CURRENT
89 39 Unused

Battery Monitor (0x02)

Start Bit Nr of Bits Meaning Units Range NA Value Remark
0 16 TTG 1min 0 .. 45.5 days 0xFFFF VE_REG_TTG
16 16 Battery voltage 0.01V -327.68..327.66 V 0x7FFF VE_REG_DC_CHANNEL1_VOLTAGE
32 16 Alarm reason 0..0xFFFF VE_REG_ALARM_REASON
48 16 Aux voltage 0.01V -327.68..327.64 V VE_REG_DC_CHANNEL2_VOLTAGE
64 16 Mid voltage 0.01V 0..655.34 V VE_REG_BATTERY_MID_POINT_VOLTAGE
80 16 Temperature 0.01K 0..655.34 K VE_REG_BAT_TEMPERATURE
96 2 Aux input 0..3 0x3 VE_REG_BMV_AUX_INPUT 0 ⇒ Aux voltage : VE_REG_DC_CHANNEL2_VOLTAGE 1 ⇒ Mid voltage : VE_REG_BATTERY_MID_POINT_VOLTAGE 2 ⇒ Temperature : VE_REG_BAT_TEMPERATURE 3 ⇒ none
98 22 Battery current 0.001A -4194..4194 A 0x3FFFFF VE_REG_DC_CHANNEL1_CURRENT_MA
120 20 Consumed Ah 0.1Ah -104,857..0 Ah 0xFFFFF VE_REG_CAH Consumed Ah = -Record value
140 10 SOC 0.1% 0..100.0% 0x3FF VE_REG_SOC
150 10 Unused

Inverter (0x03)

Start Bit Nr of Bits Meaning Units Range NA Value Remark
0 8 Device state 0..0xFE 0xFF VE_REG_DEVICE_STATE
8 16 Alarm Reason 0..0xFFFF VE_REG_ALARM_REASON
24 16 Battery voltage 0.01V -327.68..327.66 V 0x7FFF VE_REG_DC_CHANNEL1_VOLTAGE
40 16 AC Apparent power 1VA 0..65534 VA 0xFFFF VE_REG_AC_OUT_APPARENT_POWER
56 15 AC voltage 0.01V 0..327.66 V 0x7FFF VE_REG_AC_OUT_VOLTAGE
71 11 AC current 0.1A 0..204.6 A 0x7FF VE_REG_AC_OUT_CURRENT
82 46 Unused

DC/DC Converter (0x04)

Start Bit Nr of Bits Meaning Units Range NA Value Remark
0 8 Device state 0..0xFE 0xFF VE_REG_DEVICE_STATE
8 8 Charger Error 0..0xFE 0xFF VE_REG_CHR_ERROR_CODE
16 16 Input voltage 0.01V 0..655.34 V 0xFFFF VE_REG_DC_INPUT_VOLTAGE
32 16 Output voltage 0.01V -327.68..327.66V 0x7FFF VE_REG_DC_CHANNEL1_VOLTAGE
48 32 Off reason 0..0xFFFFFFFF VE_REG_DEVICE_OFF_REASON_2
80 48 Unused

SmartLithium (0x05)

Start Bit Nr of Bits Meaning Units Range NA Value Remark
0 32 BMS flags 0..0xFFFFFFFF VE_REG_BMS_FLAGs
32 16 SmartLithium error 0..0xFFFF VE_REG_SMART_LITHIUM_ERROR_FLAGS
48 7 Cell 1 0.01V 2.60..3.86 V 0x7F VE_REG_BATTERY_CELL_VOLTAGE*
55 7 Cell 2 0.01V 2.60..3.86 V 0x7F VE_REG_BATTERY_CELL_VOLTAGE*
62 7 Cell 3 0.01V 2.60..3.86 V 0x7F VE_REG_BATTERY_CELL_VOLTAGE*
69 7 Cell 4 0.01V 2.60..3.86 V 0x7F VE_REG_BATTERY_CELL_VOLTAGE*
76 7 Cell 5 0.01V 2.60..3.86 V 0x7F VE_REG_BATTERY_CELL_VOLTAGE*
83 7 Cell 6 0.01V 2.60..3.86 V 0x7F VE_REG_BATTERY_CELL_VOLTAGE*
90 7 Cell 7 0.01V 2.60..3.86 V 0x7F VE_REG_BATTERY_CELL_VOLTAGE*
97 7 Cell 8 0.01V 2.60..3.86 V 0x7F VE_REG_BATTERY_CELL_VOLTAGE*
104 12 Battery voltage 0.01V 0..40.94 V 0x0FFF VE_REG_DC_CHANNEL1_VOLTAGE
116 4 Balancer status 0..15 0x0F VE_REG_BALANCER_STATUS
120 7 Battery temperature 1°C -40..86 °C 0x7F VE_REG_BAT_TEMPERATURE Temperature = Record value - 40
127 1 Unused
  • VE_REG_BATTERY_CELL_VOLTAGE 0x00 ( 0) when cell voltage < 2.61V 0x01 ( 1) when cell voltage == 2.61V 0x7D (125) when cell voltage == 3.85V 0x7E (126) when cell voltage > 3.85 0x7F (127) when cell voltage is not available / unknown

Inverter RS (0x06)

Start Bit Nr of Bits Meaning Units Range NA Value Remark
0 8 Device state 0..0xFE 0xFF VE_REG_DEVICE_STATE
8 8 Charger Error 0..0xFE 0xFF VE_REG_CHR_ERROR_CODE
16 16 Battery voltage 0.01V -327.68..327.66 V 0x7FFF VE_REG_DC_CHANNEL1_VOLTAGE
32 16 Battery current 0.1A -3276.8 ..3276.6 A 0x7FFF VE_REG_DC_CHANNEL1_CURRENT
48 16 PV power 1W 0..65,534 W 0xFFFF VE_REG_DC_INPUT_POWER
64 16 Yield today 0.01kWh 0..655.34 kWh 0xFFFF VE_REG_CHR_TODAY_YIELD 655.34 kWh is 27.3 kW@24h
80 16 AC out power 1W -32,768..32,766 W 0x7FFF VE_REG_AC_OUT_REAL_POWER
96 32 Unused

GX-Device (0x07)

Record layout is still to be determined and might change.

Start Bit Nr of Bits Meaning Units Range NA Value Remark
0 16 Battery voltage 0.01 V 0..655.34V 0xFFFF VE_REG_DC_CHANNEL1_VOLTAGE
16 20 PV power W 0..1 MW 0xFFFFF VE_REG_DC_INPUT_POWER
36 7 SOC 1% 0..100% 0x7F VE_REG_SOC
43 21 Battery power W -1..1 MW 0x0FFFFF VE_REG_DC_CHANNEL1_POWER
64 21 DC power W -1..1 MW 0x0FFFFF
TBD - AC in power
TBD - AC out power
TBD - Warnings / Alarms
TBD
117 43 Unused

AC Charger (0x08)

Record layout is still to be determined and might change.

Start Bit Nr of Bits Meaning Units Range NA Value Remark
0 8 Device state 0..0xFE 0xFF VE_REG_DEVICE_STATE
8 8 Charger Error 0..0xFE 0xFF VE_REG_CHR_ERROR_CODE
16 13 Battery voltage 1 0.01V 0..81.90 V 0x1FFF VE_REG_DC_CHANNEL1_VOLTAGE
29 11 Battery current 1 0.1A 0..204.6 A 0x7FF VE_REG_DC_CHANNEL1_CURRENT
40 13 Battery voltage 2 0.01 V 0..81.90 V 0x1FFF VE_REG_DC_CHANNEL2_VOLTAGE
53 11 Battery current 2 0.1A 0..204.6 A 0x7FF VE_REG_DC_CHANNEL2_CURRENT
64 13 Battery voltage 3 0.01V 0..81.90 V 0x1FFF VE_REG_DC_CHANNEL3_VOLTAGE
77 11 Battery current 3 0.1A 0..204.6 A 0x7FF VE_REG_DC_CHANNEL3_CURRENT
88 7 Temperature °C -40..86 °C 0x7F VE_REG_BAT_TEMPERATURE Temperature = Record value - 40
95 9 AC current 0.1A 0..51.0 A 0x1FF VE_REG_AC_ACTIVE_INPUT_L1_CURRENT
104 24 Unused

Smart Battery Protect (0x09)

Start Bit Nr of Bits Meaning Units Range NA Value Remark
0 8 Device state 0..0xFE 0xFF VE_REG_DEVICE_STATE
8 8 Output state 0..0xFE 0xFF VE_REG_DC_OUTPUT_STATUS
16 8 Error code 0..0xFE 0xFF VE_REG_CHR_ERROR_CODE
24 16 Alarm reason 0..0xFFFF VE_REG_ALARM_REASON
40 16 Warning reason 0..0xFFFF VE_REG_WARNING_REASON
56 16 Input voltage 0.01V 327.68..327.66V 0x7FFF VE_REG_DC_CHANNEL1_VOLTAGE
72 16 Output voltage 0.01V 0..655.34 V 0xFFFF VE_REG_DC_OUTPUT_VOLTAGE
88 32 Off reason 0..0xFFFFFFFF VE_REG_DEVICE_OFF_REASON_2
120 32 Unused

(Lynx Smart) BMS (0x0A)

Start Bit Nr of Bits Meaning Units Range NA Value Remark
0 8 Error 0x0 VE_REG_BMS_ERROR
8 16 TTG 1min 0..45.5 days 0xFFFF VE_REG_TTG
24 16 Battery voltage 0.01V -327.68..327.66 V 0x7FFF VE_REG_DC_CHANNEL1_VOLTAGE
40 16 Battery current 0.1A -3276.8..3276.6 0x7FFF VE_REG_DC_CHANNEL1_CURRENT
56 16 IO status 0x0 VE_REG_BMS_IO
72 18 Warnings/Alarms 0x0 VE_REG_BMS_WARNINGS_ALARMS
90 10 SOC 0.1% 0..100.0% 0x3FF VE_REG_SOC
100 20 Consumed Ah 0.1Ah -104,857..0 Ah 0xFFFFF VE_REG_CAH Consumed Ah = -Record value
120 7 Temperature °C -40..86 °C 0x7F VE_REG_BAT_TEMPERATURE Temperature = Record value - 40
127 1 Unused

Multi RS (0x0B)

Start Bit Nr of Bits Meaning Units Range NA Value Remark
0 8 Device state 0..0xFE 0xFF VE_REG_DEVICE_STATE
8 8 Charger Error 0..0xFE 0xFF VE_REG_CHR_ERROR_CODE
16 16 Battery current 0.1A -3276.8..3276.6 A 0x7FFF VE_REG_DC_CHANNEL1_CURRENT
32 14 Battery voltage 0.01V 0..163.83V 0x3FFF VE_REG_DC_CHANNEL1_VOLTAGE
46 2 Active AC in 0..3 0x3 VE_REG_AC_IN_ACTIVE 0 = AC in 1, 1 = AC in 2, 2 = Not connected, 3 = unknown
48 16 Active AC in power 1W -32,768..32,766 W 0x7FFF VE_REG_AC_IN_1_REAL_POWER or VE_REG_AC_IN_2_REAL_POWER, depending on VE_REG_AC_IN_ACTIVE
64 16 AC out power 1W -32,768..32,766 W 0x7FFF VE_REG_AC_OUT_REAL_POWER
80 16 PV power 1W 0..65534W 0xFFFF VE_REG_DC_INPUT_POWER
96 16 Yield today 0.01kWh 0..655.34kWh 0xFFFF VE_REG_CHR_TODAY_YIELD 655.34 kWh is 27.3 kW@24h
112 16 Unused

VE.Bus (0x0C)

Start Bit Nr of Bits Meaning Units Range NA Value Remark
0 8 Device state 0..0xFE 0xFF VE_REG_DEVICE_STATE
8 8 VE.Bus error 0..0xFE 0xFF VE_REG_VEBUS_VEBUS_ERROR
16 16 Battery current 0.1A -3276.8..3276.6 A 0x7FFF VE_REG_DC_CHANNEL1_CURRENT
32 14 Battery voltage 0.01V 0..163.83V 0x3FFF VE_REG_DC_CHANNEL1_VOLTAGE
46 2 Active AC in 0..3 0x3 VE_REG_AC_IN_ACTIVE 0 = AC in 1, 1 = AC in 2, 2 = Not connected, 3 = unknown
48 19 Active AC in power 1W -262,144..262,142 W 0x3FFFF VE_REG_AC_IN_1_REAL_POWER or VE_REG_AC_IN_2_REAL_POWER, depending on VE_REG_AC_IN_ACTIVE
67 19 AC out power 1W -262,144..262,142 W 0x3FFFF VE_REG_AC_OUT_REAL_POWER
86 2 Alarm 0..2 3 VE_REG_ALARM_NOTIFICATION (to be defined) 0 = no alarm, 1 = warning, 2 = alarm
88 7 Battery temperature 1°C -40..86 °C 0x7F VE_REG_BAT_TEMPERATURE Temperature = Record value - 40
95 7 SOC 1% 0..126 % 0x7F VE_REG_SOC
102 26 Unused

DC Energy Meter (0x0D)

Start Bit Nr of Bits Meaning Units Range NA Value Remark
0 16 BMV monitor mode –32768..32767 VE_REG_BMV_MONITOR_MODE
16 16 Battery voltage 0.01V -327.68..327.66 V 0x7FFF VE_REG_DC_CHANNEL1_VOLTAGE
32 16 Alarm reason 0..0xFFFF VE_REG_ALARM_REASON
48 16 Aux voltage Temperature 0.01V 0.01K -327.68..327.64 V 0..655.34 K VE_REG_DC_CHANNEL2_VOLTAGE VE_REG_BAT_TEMPERATURE
64 2 Aux input 0..3 0x3 VE_REG_BMV_AUX_INPUT 0 ⇒ Aux voltage : VE_REG_DC_CHANNEL2_VOLTAGE 2 ⇒ Temperature : VE_REG_BAT_TEMPERATURE 3 ⇒ none
66 22 Battery current 0.001A -4194..4194 A 0x3FFFFF VE_REG_DC_CHANNEL1_CURRENT_MA
88 40 Unused

Orion XS (0x0F)

Start Bit Nr of Bits Meaning Units Range NA Value Remark
0 8 Device State 0..0xFF VE_REG_DEVICE_STATE
8 8 Error Code 0..0xFF VE_REG_CHR_ERROR_CODE
16 16 Output Voltage 0.01V -327.68..327.66 V 0x7FFF VE_REG_DC_CHANNEL1_VOLTAGE
32 16 Output Current 0.1A -3276.8..327.66 A 0x7FFF VE_REG_DC_CHANNEL1_CURRENT
48 16 Input Voltage 0.01V 0..655.34 V 0xFFFF VE_REG_DC_INPUT_VOLTAGE
64 16 Input Current 0.1A 0..6553.4 A 0xFFFF VE_REG_DC_INPUT_CURRENT
80 32 Device Off Reason 0..429496728 VE_REG_DEVICE_OFF_REASON_2
112 16 Unused

About

Log Victron Direct Bluetooth LE messages and graph battery states

Topics

raspberrypi bluetooth bluetooth-low-energy victron victronenergy

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