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/* packet-lithionics.c
* Routines for Lithionics NeverDie Battery Management System (BMS)
* By Michael Mann <Michael.Mann@jbtc.com>
* Copyright 2018 Michael Mann
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* From https://lithionicsbattery.com/wp-content/uploads/2018/06/NeverDie-BMS-Advanced-RS232-UART-serial-protocol-Rev7.15.pdf
*/
#include "config.h"
#include <epan/packet.h>
#include <wsutil/strtoi.h>
void proto_register_lithionics(void);
void proto_reg_handoff_lithionics(void);
static dissector_handle_t lithionics_handle;
static int proto_lithionics = -1;
static int hf_lithionics_battery_address = -1;
static int hf_lithionics_amp_hours_remain = -1;
static int hf_lithionics_volts = -1;
static int hf_lithionics_bat_gauge = -1;
static int hf_lithionics_soc = -1;
static int hf_lithionics_direction = -1;
static int hf_lithionics_amps = -1;
static int hf_lithionics_watts = -1;
static int hf_lithionics_temperature = -1;
static int hf_lithionics_system_status = -1;
static int hf_lithionics_system_status_high_voltage_state = -1;
static int hf_lithionics_system_status_charge_source_detected = -1;
static int hf_lithionics_system_status_neverdie_reserve_state = -1;
static int hf_lithionics_system_status_optoloop_cell_open = -1;
static int hf_lithionics_system_status_reserve_voltage_range = -1;
static int hf_lithionics_system_status_low_voltage_state = -1;
static int hf_lithionics_system_status_battery_protection_state = -1;
static int hf_lithionics_system_status_power_off_state = -1;
static int hf_lithionics_system_status_aux_contacts_state = -1;
static int hf_lithionics_system_status_aux_contacts_error = -1;
static int hf_lithionics_system_status_precharge_error = -1;
static int hf_lithionics_system_status_contactor_flutter = -1;
static int hf_lithionics_system_status_ac_power_present = -1;
static int hf_lithionics_system_status_tsm_charger_present = -1;
static int hf_lithionics_system_status_tsm_charger_error = -1;
static int hf_lithionics_system_status_external_temp_sensor_error = -1;
static int hf_lithionics_system_status_agsr_state = -1;
static int hf_lithionics_system_status_high_temperature_state = -1;
static int hf_lithionics_system_status_low_temperature_state = -1;
static int hf_lithionics_system_status_aux_input1_state = -1;
static int hf_lithionics_system_status_charge_disable_state = -1;
static int hf_lithionics_system_status_overcurrent_state = -1;
static int hf_lithionics_system_status_reserved = -1;
static int hf_lithionics_temination = -1;
static gint ett_lithionics = -1;
static gint ett_lithionics_system_status = -1;
static int* const system_status_flags[] = {
&hf_lithionics_system_status_high_voltage_state,
&hf_lithionics_system_status_charge_source_detected,
&hf_lithionics_system_status_neverdie_reserve_state,
&hf_lithionics_system_status_optoloop_cell_open,
&hf_lithionics_system_status_reserve_voltage_range,
&hf_lithionics_system_status_low_voltage_state,
&hf_lithionics_system_status_battery_protection_state,
&hf_lithionics_system_status_power_off_state,
&hf_lithionics_system_status_aux_contacts_state,
&hf_lithionics_system_status_aux_contacts_error,
&hf_lithionics_system_status_precharge_error,
&hf_lithionics_system_status_contactor_flutter,
&hf_lithionics_system_status_ac_power_present,
&hf_lithionics_system_status_tsm_charger_present,
&hf_lithionics_system_status_tsm_charger_error,
&hf_lithionics_system_status_external_temp_sensor_error,
&hf_lithionics_system_status_agsr_state,
&hf_lithionics_system_status_high_temperature_state,
&hf_lithionics_system_status_low_temperature_state,
&hf_lithionics_system_status_aux_input1_state,
&hf_lithionics_system_status_charge_disable_state,
&hf_lithionics_system_status_overcurrent_state,
&hf_lithionics_system_status_reserved,
NULL
};
static const value_string lithionics_direction_vals[] = {
{ 0, "Discharging" },
{ 1, "Charging" },
{ 0, NULL }
};
static const true_false_string tfs_lithionics_high_voltage_state = { "Above HVC", "Below HVC" };
static const true_false_string tfs_lithionics_reserve_voltage_range = { "Below RVC", "Above RVC" };
static const true_false_string tfs_lithionics_low_voltage_state = { "Below LVC", "Above LVC" };
static const true_false_string tfs_lithionics_battery_protection_state = { "Recovering from abnormal event", "Normal" };
static const true_false_string tfs_lithionics_power_off_state = { "Command", "Button" };
static const true_false_string tfs_lithionics_high_temperature_state = { "Exceeds allowed threshold", "Normal" };
static const true_false_string tfs_lithionics_low_temperature_state = { "Below allowed threshold", "Normal" };
static int
dissect_lithionics(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_tree *lithionics_tree, *status_tree;
proto_item *ti;
int offset = 0;
char* str;
float f;
guint32 value;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "Lithionics");
col_clear(pinfo->cinfo, COL_INFO);
ti = proto_tree_add_item(tree, proto_lithionics, tvb, 0, -1, ENC_NA);
lithionics_tree = proto_item_add_subtree(ti, ett_lithionics);
//just put the whole packet string (minus newlines) in the Info column
col_set_str(pinfo->cinfo, COL_INFO, (const gchar*)tvb_get_string_enc(pinfo->pool, tvb, offset, tvb_reported_length_remaining(tvb, offset)-2, ENC_ASCII));
str = (char*)tvb_get_string_enc(pinfo->pool, tvb, offset + 1, 1, ENC_ASCII);
if (!ws_strtou32(str, NULL, &value))
proto_tree_add_uint_format_value(lithionics_tree, hf_lithionics_battery_address, tvb, offset, 2, 0, "<Invalid value \"%s\">", str);
else
proto_tree_add_uint(lithionics_tree, hf_lithionics_battery_address, tvb, offset, 2, value);
offset += 2;
str = (char*)tvb_get_string_enc(pinfo->pool, tvb, offset + 1, 5, ENC_ASCII);
if (!ws_strtou32(str, NULL, &value))
proto_tree_add_float_format_value(lithionics_tree, hf_lithionics_amp_hours_remain, tvb, offset, 6, 0.0, "<Invalid value \"%s\">", str);
else {
f = (float)(value*.1);
proto_tree_add_float_format_value(lithionics_tree, hf_lithionics_amp_hours_remain, tvb, offset, 6, f, "%0.1fAh", f);
}
offset += 6;
str = (char*)tvb_get_string_enc(pinfo->pool, tvb, offset + 1, 4, ENC_ASCII);
if (!ws_strtou32(str, NULL, &value))
proto_tree_add_float_format_value(lithionics_tree, hf_lithionics_volts, tvb, offset, 5, 0.0, "<Invalid value \"%s\">", str);
else {
f = (float)(value*.1);
proto_tree_add_float_format_value(lithionics_tree, hf_lithionics_volts, tvb, offset, 5, f, "%0.1fV", f);
}
offset += 5;
str = (char*)tvb_get_string_enc(pinfo->pool, tvb, offset + 1, 3, ENC_ASCII);
if (!ws_strtou32(str, NULL, &value))
proto_tree_add_uint_format_value(lithionics_tree, hf_lithionics_bat_gauge, tvb, offset, 4, 0, "<Invalid value \"%s\">", str);
else
proto_tree_add_uint(lithionics_tree, hf_lithionics_bat_gauge, tvb, offset, 4, value);
offset += 4;
str = (char*)tvb_get_string_enc(pinfo->pool, tvb, offset + 1, 3, ENC_ASCII);
if (!ws_strtou32(str, NULL, &value))
proto_tree_add_uint_format_value(lithionics_tree, hf_lithionics_soc, tvb, offset, 4, 0, "<Invalid value \"%s\">", str);
else
proto_tree_add_uint(lithionics_tree, hf_lithionics_soc, tvb, offset, 4, value);
offset += 4;
str = (char*)tvb_get_string_enc(pinfo->pool, tvb, offset + 1, 1, ENC_ASCII);
if (!ws_strtou32(str, NULL, &value))
proto_tree_add_uint_format_value(lithionics_tree, hf_lithionics_direction, tvb, offset, 2, 0, "<Invalid value \"%s\">", str);
else
proto_tree_add_uint(lithionics_tree, hf_lithionics_direction, tvb, offset, 2, value);
offset += 2;
str = (char*)tvb_get_string_enc(pinfo->pool, tvb, offset + 1, 5, ENC_ASCII);
if (!ws_strtou32(str, NULL, &value))
proto_tree_add_float_format_value(lithionics_tree, hf_lithionics_amps, tvb, offset, 6, 0.0, "<Invalid value \"%s\">", str);
else {
f = (float)(value*.1);
proto_tree_add_float_format_value(lithionics_tree, hf_lithionics_amps, tvb, offset, 6, f, "%0.1fAmp", f);
}
offset += 6;
str = (char*)tvb_get_string_enc(pinfo->pool, tvb, offset + 1, 6, ENC_ASCII);
if (!ws_strtou32(str, NULL, &value))
proto_tree_add_uint_format_value(lithionics_tree, hf_lithionics_watts, tvb, offset, 7, 0, "<Invalid value \"%s\">", str);
else
proto_tree_add_uint(lithionics_tree, hf_lithionics_watts, tvb, offset, 7, value);
offset += 7;
str = (char*)tvb_get_string_enc(pinfo->pool, tvb, offset + 1, 3, ENC_ASCII);
if (!ws_strtou32(str, NULL, &value))
proto_tree_add_uint_format_value(lithionics_tree, hf_lithionics_temperature, tvb, offset, 4, 0, "<Invalid value \"%s\">", str);
else
proto_tree_add_uint(lithionics_tree, hf_lithionics_temperature, tvb, offset, 4, value);
offset += 4;
str = (char*)tvb_get_string_enc(pinfo->pool, tvb, offset + 1, 6, ENC_ASCII);
//do this over proto_tree_add_bitmask_value to get better field highlighting
if (!ws_hexstrtou32(str, NULL, &value))
proto_tree_add_uint_format_value(lithionics_tree, hf_lithionics_system_status, tvb, offset, 7, 0, "<Invalid value \"%s\">", str);
else {
ti = proto_tree_add_uint(lithionics_tree, hf_lithionics_system_status, tvb, offset, 7, value);
status_tree = proto_item_add_subtree(ti, ett_lithionics_system_status);
proto_tree_add_bitmask_list_value(status_tree, tvb, offset, 7, system_status_flags, value);
}
offset += 7;
proto_tree_add_item(lithionics_tree, hf_lithionics_temination, tvb, offset, 2, ENC_NA);
offset += 2;
return offset;
}
void
proto_register_lithionics(void)
{
static hf_register_info hf[] = {
{ &hf_lithionics_battery_address,
{ "Battery address", "lithionics_bms.battery_address", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_lithionics_amp_hours_remain,
{ "Amp Hours Remaining", "lithionics_bms.amp_hours_remain", FT_FLOAT, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_lithionics_volts,
{ "Volts", "lithionics_bms.volts", FT_FLOAT, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_lithionics_bat_gauge,
{ "Bat gauge", "lithionics_bms.bat_gauge", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_percent, 0x0, NULL, HFILL } },
{ &hf_lithionics_soc,
{ "SoC", "lithionics_bms.soc", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_percent, 0x0, NULL, HFILL } },
{ &hf_lithionics_direction,
{ "Direction", "lithionics_bms.direction", FT_UINT16, BASE_DEC, VALS(lithionics_direction_vals), 0x0, NULL, HFILL } },
{ &hf_lithionics_amps,
{ "Amps", "lithionics_bms.amps", FT_FLOAT, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_lithionics_watts,
{ "Watts", "lithionics_bms.watts", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_watt, 0x0, NULL, HFILL } },
{ &hf_lithionics_temperature,
{ "Temperature", "lithionics_bms.temperature", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_degree_degrees, 0x0, NULL, HFILL } },
{ &hf_lithionics_temination,
{ "Newline Termination", "lithionics_bms.termination", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_lithionics_system_status,
{ "System Status", "lithionics_bms.system_status", FT_UINT24, BASE_HEX, NULL, 0x0, NULL, HFILL } },
{ &hf_lithionics_system_status_high_voltage_state,
{ "High Voltage State", "lithionics_bms.system_status.high_voltage_state", FT_BOOLEAN, 24, TFS(&tfs_lithionics_high_voltage_state), 0x000001, NULL, HFILL } },
{ &hf_lithionics_system_status_charge_source_detected,
{ "Charge Source Detected", "lithionics_bms.system_status.charge_source_detected", FT_BOOLEAN, 24, NULL, 0x000002, NULL, HFILL } },
{ &hf_lithionics_system_status_neverdie_reserve_state,
{ "NeverDie Reserve State", "lithionics_bms.system_status.neverdie_reserve_state", FT_BOOLEAN, 24, NULL, 0x000004, NULL, HFILL } },
{ &hf_lithionics_system_status_optoloop_cell_open,
{ "OptoLoop Cell Loop is open", "lithionics_bms.system_status.optoloop_cell_open", FT_BOOLEAN, 24, NULL, 0x000008, NULL, HFILL } },
{ &hf_lithionics_system_status_reserve_voltage_range,
{ "Reserve Voltage Range", "lithionics_bms.system_status.reserve_voltage_range", FT_BOOLEAN, 24, TFS(&tfs_lithionics_reserve_voltage_range), 0x000010, NULL, HFILL } },
{ &hf_lithionics_system_status_low_voltage_state,
{ "Low Voltage State", "lithionics_bms.system_status.low_voltage_state", FT_BOOLEAN, 24, TFS(&tfs_lithionics_low_voltage_state), 0x000020, NULL, HFILL } },
{ &hf_lithionics_system_status_battery_protection_state,
{ "Battery Protection State", "lithionics_bms.system_status.battery_protection_state", FT_BOOLEAN, 24, TFS(&tfs_lithionics_battery_protection_state), 0x000040, NULL, HFILL } },
{ &hf_lithionics_system_status_power_off_state,
{ "Power Off State", "lithionics_bms.system_status.power_off_state", FT_BOOLEAN, 24, TFS(&tfs_lithionics_power_off_state), 0x000080, NULL, HFILL } },
{ &hf_lithionics_system_status_aux_contacts_state,
{ "AUX Contacts State", "lithionics_bms.system_status.aux_contacts_state", FT_BOOLEAN, 24, NULL, 0x000100, NULL, HFILL } },
{ &hf_lithionics_system_status_aux_contacts_error,
{ "AUX Contacts Error", "lithionics_bms.system_status.aux_contacts_error", FT_BOOLEAN, 24, NULL, 0x000200, NULL, HFILL } },
{ &hf_lithionics_system_status_precharge_error,
{ "Pre-charge Error", "lithionics_bms.system_status.precharge_error", FT_BOOLEAN, 24, NULL, 0x000400, NULL, HFILL } },
{ &hf_lithionics_system_status_contactor_flutter,
{ "Contactor Flutter", "lithionics_bms.system_status.contactor_flutter", FT_BOOLEAN, 24, NULL, 0x000800, NULL, HFILL } },
{ &hf_lithionics_system_status_ac_power_present,
{ "AC Power Present", "lithionics_bms.system_status.ac_power_present", FT_BOOLEAN, 24, NULL, 0x001000, NULL, HFILL } },
{ &hf_lithionics_system_status_tsm_charger_present,
{ "TSM Charger Present", "lithionics_bms.system_status.tsm_charger_present", FT_BOOLEAN, 24, NULL, 0x002000, NULL, HFILL } },
{ &hf_lithionics_system_status_tsm_charger_error,
{ "TSM Charger Error", "lithionics_bms.system_status.tsm_charger_error", FT_BOOLEAN, 24, NULL, 0x004000, NULL, HFILL } },
{ &hf_lithionics_system_status_external_temp_sensor_error,
{ "External Temp Sensor Error", "lithionics_bms.system_status.external_temp_sensor_error", FT_BOOLEAN, 24, NULL, 0x008000, NULL, HFILL } },
{ &hf_lithionics_system_status_agsr_state,
{ "AGSR State", "lithionics_bms.system_status.agsr_state", FT_BOOLEAN, 24, NULL, 0x010000, NULL, HFILL } },
{ &hf_lithionics_system_status_high_temperature_state,
{ "High Temperature State", "lithionics_bms.system_status.high_temperature_state", FT_BOOLEAN, 24, TFS(&tfs_lithionics_high_temperature_state), 0x020000, NULL, HFILL } },
{ &hf_lithionics_system_status_low_temperature_state,
{ "Low Temperature State", "lithionics_bms.system_status.low_temperature_state", FT_BOOLEAN, 24, TFS(&tfs_lithionics_low_temperature_state), 0x040000, NULL, HFILL } },
{ &hf_lithionics_system_status_aux_input1_state,
{ "Auxiliary Input 1 State", "lithionics_bms.system_status.aux_input1_state", FT_BOOLEAN, 24, NULL, 0x080000, NULL, HFILL } },
{ &hf_lithionics_system_status_charge_disable_state,
{ "Charge Disable State", "lithionics_bms.system_status.charge_disable_state", FT_BOOLEAN, 24, NULL, 0x100000, NULL, HFILL } },
{ &hf_lithionics_system_status_overcurrent_state,
{ "Overcurrent State", "lithionics_bms.system_status.overcurrent_state", FT_BOOLEAN, 24, NULL, 0x200000, NULL, HFILL } },
{ &hf_lithionics_system_status_reserved,
{ "Reserved", "lithionics_bms.system_status.reserved", FT_UINT24, BASE_HEX, NULL, 0xC00000, NULL, HFILL } },
};
static gint *ett[] = {
&ett_lithionics,
&ett_lithionics_system_status,
};
proto_lithionics = proto_register_protocol("Lithionics Battery Management System", "Lithionics BMS", "lithionics_bms");
proto_register_field_array(proto_lithionics, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
lithionics_handle = register_dissector("lithionics_bms", dissect_lithionics, proto_lithionics);
}
void
proto_reg_handoff_lithionics(void)
{
dissector_add_for_decode_as("udp.port", lithionics_handle);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=false:
*/
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