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https://github.com/dalathegreat/Battery-Emulator.git
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Merge pull request #1367 from dalathegreat/feature/growatt-WIT
New Inverter ⚡ Add initial support for Growatt Wit CAN
This commit is contained in:
Daniel Öster
GitHub
commit
27f95c5388
5 changed files with 289 additions and 0 deletions
154
Software/src/inverter/GROWATT-WIT-CAN.cpp
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154
Software/src/inverter/GROWATT-WIT-CAN.cpp
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#include "GROWATT-WIT-CAN.h"
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#include "../communication/can/comm_can.h"
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#include "../datalayer/datalayer.h"
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/* TODO:
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This protocol has not been tested with any inverter. Proceed with extreme caution.
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Search the file for "TODO" to see all the places that might require work
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Largest TODO: Map all CAN message .ID properly
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Example, how should 1AC6XXXX be transmitted? .ID = 0x1AC6, at the time being, but we need to add the targegt address and source address.
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GROWATT BATTERY BMS CAN COMMUNICATION PROTOCOL V1.1 2024.7.19
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29-bit identifier
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500kBit/sec
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Big-endian
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Internal CAN: The extended frame CAN_ID is 29 bits, and the 29-bit CAN_ID is divided into five parts:
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PRI, PG, DA, SA, and FSN.
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- PRI: indicates priority.
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- PG: indicates the page number. If the FSN is not enough, you can turn the page to increase the range of the FSN.
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- TA: indicates the target address.
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- SA: indicates the source address.
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- FSN: represents functional domain.
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(See the Wiki for full documentation explained)
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Example: 0x1AC0FFF3: PRI is 6, PG is 2, FSN is 0xC0, TA is 0xFF, SA is 0xF3
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*/
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void GrowattWitInverter::update_values() {
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//Maximum allowable charging current of the battery system, 0-10000 dA
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GROWATT_1AC3XXXX.data.u8[0] = (datalayer.battery.status.max_charge_current_dA >> 8);
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GROWATT_1AC3XXXX.data.u8[1] = (datalayer.battery.status.max_charge_current_dA & 0x00FF);
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//Maximum allowable discharge current of the battery system, 0-10000 dA
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GROWATT_1AC3XXXX.data.u8[2] = (datalayer.battery.status.max_discharge_current_dA >> 8);
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GROWATT_1AC3XXXX.data.u8[3] = (datalayer.battery.status.max_discharge_current_dA & 0x00FF);
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//Maximum charging voltage of the battery system 0-15000 dV
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//Stop charging when the current battery output voltage is greater than or equal to this value
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if (datalayer.battery.settings.user_set_voltage_limits_active) { //If user is requesting a specific voltage
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//User specified charge voltage (eg 400.0V = 4000 , 16bits long) (MIN 0, MAX 1000V)
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GROWATT_1AC3XXXX.data.u8[4] = (datalayer.battery.settings.max_user_set_charge_voltage_dV >> 8);
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GROWATT_1AC3XXXX.data.u8[5] = (datalayer.battery.settings.max_user_set_charge_voltage_dV & 0x00FF);
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GROWATT_1AC3XXXX.data.u8[6] = (datalayer.battery.settings.max_user_set_discharge_voltage_dV >> 8);
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GROWATT_1AC3XXXX.data.u8[7] = (datalayer.battery.settings.max_user_set_discharge_voltage_dV & 0x00FF);
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} else {
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//Battery max voltage used as charge voltage (eg 400.0V = 4000 , 16bits long) (MIN 0, MAX 1000V)
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GROWATT_1AC3XXXX.data.u8[4] = (datalayer.battery.info.max_design_voltage_dV >> 8);
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GROWATT_1AC3XXXX.data.u8[5] = (datalayer.battery.info.max_design_voltage_dV & 0x00FF);
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GROWATT_1AC3XXXX.data.u8[6] = (datalayer.battery.info.min_design_voltage_dV >> 8);
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GROWATT_1AC3XXXX.data.u8[7] = (datalayer.battery.info.min_design_voltage_dV & 0x00FF);
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}
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//CV voltage value
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//Total charge voltage of constant voltage (set to 10.0V below max voltage for now)
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//When the battery output voltage is greater than or equal to this value, enter constant voltage charging state.
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if (datalayer.battery.settings.user_set_voltage_limits_active) { //If user is requesting a specific voltage
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//User specified charge voltage (eg 400.0V = 4000 , 16bits long) (MIN 0, MAX 1000V)
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GROWATT_1AC4XXXX.data.u8[4] = ((datalayer.battery.settings.max_user_set_charge_voltage_dV - 100) >> 8);
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GROWATT_1AC4XXXX.data.u8[5] = ((datalayer.battery.settings.max_user_set_charge_voltage_dV - 100) & 0x00FF);
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} else {
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//Battery max voltage used as charge voltage (eg 400.0V = 4000 , 16bits long) (MIN 0, MAX 1000V)
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GROWATT_1AC4XXXX.data.u8[4] = ((datalayer.battery.info.max_design_voltage_dV - 100) >> 8);
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GROWATT_1AC4XXXX.data.u8[5] = ((datalayer.battery.info.max_design_voltage_dV - 100) & 0x00FF);
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}
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//System BMS working status
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if (datalayer.battery.status.current_dA == 0) {
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GROWATT_1AC5XXXX.data.u8[0] = 1; //Standby
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} else if (datalayer.battery.status.current_dA < 0) { //Negative value = Discharging
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GROWATT_1AC5XXXX.data.u8[0] = 3; //Discharging
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} else { //Positive value = Charging
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GROWATT_1AC5XXXX.data.u8[0] = 2; //Charging
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}
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if (datalayer.battery.status.bms_status == FAULT) {
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GROWATT_1AC5XXXX.data.u8[0] = 5; //FAULT, Stop using battery!
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}
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//SOC 0-100 %
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GROWATT_1AC6XXXX.data.u8[0] = (datalayer.battery.status.reported_soc / 100);
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//SOH (%) (Bit 0~ Bit6 SOH Counters) Bit7 low SOH flag (Indicates that battery is in unsafe use)
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GROWATT_1AC6XXXX.data.u8[1] = (datalayer.battery.status.soh_pptt / 100);
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//Rated battery capacity when new (0-50000) dAH
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GROWATT_1AC6XXXX.data.u8[2]; //TODO
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GROWATT_1AC6XXXX.data.u8[3]; //TODO
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//Battery voltage, 0-15000 dV
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GROWATT_1AC7XXXX.data.u8[2] = (datalayer.battery.status.voltage_dV >> 8);
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GROWATT_1AC7XXXX.data.u8[3] = (datalayer.battery.status.voltage_dV & 0x00FF);
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//Battery current, 0-20000dA (offset -1000A)
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// Apply the -1000 offset (add 1000 to the dA value)
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uint32_t current_value = (int32_t)datalayer.battery.status.current_dA + 1000;
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// Clamp to uint16_t range (0 to 65535)
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if (current_value < 0) {
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current_value = 0;
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} else if (current_value > 65535) {
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current_value = 65535;
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}
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GROWATT_1AC7XXXX.data.u8[4] = (current_value >> 8);
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GROWATT_1AC7XXXX.data.u8[5] = (current_value & 0x00FF);
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}
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void GrowattWitInverter::map_can_frame_to_variable(CAN_frame rx_frame) {
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uint32_t first4bytes = ((rx_frame.ID & 0xFFFF0000) >> 4);
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//1AB5XXXX becomes 1AB5. Most likely not needed if all PCS messages come from XXXXDFF1
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switch (first4bytes) {
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case 0x1AB5: // Heartbeat command, 1000ms
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datalayer.system.status.CAN_inverter_still_alive = CAN_STILL_ALIVE;
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break;
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case 0x1AB6: // Time and date, 1000ms
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datalayer.system.status.CAN_inverter_still_alive = CAN_STILL_ALIVE;
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break;
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case 0x1AB7: // PCS status information, 1000ms
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datalayer.system.status.CAN_inverter_still_alive = CAN_STILL_ALIVE;
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break;
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case 0x1AB8: // Bus voltage setting 1, 50ms
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datalayer.system.status.CAN_inverter_still_alive = CAN_STILL_ALIVE;
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break;
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case 0x1ABE: // PCS product information, Non-periodic
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datalayer.system.status.CAN_inverter_still_alive = CAN_STILL_ALIVE;
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transmit_can_frame(&GROWATT_1AC2XXXX);
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transmit_can_frame(&GROWATT_1A80XXXX);
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transmit_can_frame(&GROWATT_1A82XXXX);
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break;
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default:
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break;
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}
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}
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void GrowattWitInverter::transmit_can(unsigned long currentMillis) {
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//Send 100ms message
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if (currentMillis - previousMillis100ms >= INTERVAL_100_MS) {
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previousMillis100ms = currentMillis;
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transmit_can_frame(&GROWATT_1AC3XXXX);
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transmit_can_frame(&GROWATT_1AC4XXXX);
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transmit_can_frame(&GROWATT_1AC5XXXX);
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transmit_can_frame(&GROWATT_1AC7XXXX);
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}
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//Send 500ms message
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if (currentMillis - previousMillis500ms >= INTERVAL_500_MS) {
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previousMillis500ms = currentMillis;
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transmit_can_frame(&GROWATT_1AC6XXXX);
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}
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}
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126
Software/src/inverter/GROWATT-WIT-CAN.h
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126
Software/src/inverter/GROWATT-WIT-CAN.h
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#ifndef GROWATT_WIT_CAN_H
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#define GROWATT_WIT_CAN_H
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#include "CanInverterProtocol.h"
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#ifdef GROWATT_WIT_CAN
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#define SELECTED_INVERTER_CLASS GrowattWitInverter
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#endif
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class GrowattWitInverter : public CanInverterProtocol {
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public:
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const char* name() override { return Name; }
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void update_values();
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void transmit_can(unsigned long currentMillis);
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void map_can_frame_to_variable(CAN_frame rx_frame);
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static constexpr const char* Name = "Growatt WIT compatible battery via CAN";
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private:
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/* Do not change code below unless you are sure what you are doing */
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//Actual content messages
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CAN_frame GROWATT_1AC3XXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1AC3, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1AC4XXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1AC4, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1AC5XXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1AC5, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1AC6XXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1AC6, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1AC7XXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1AC7, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1AC0XXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1AC0, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1AC2XXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1AC2, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1AC8XXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1AC8, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1AC9XXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1AC9, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1ACAXXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1ACA, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1ACCXXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1ACC, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1ACDXXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1ACD, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1ACEXXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1ACE, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1ACFXXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1ACF, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1AD0XXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1AD0, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1AD1XXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1AD1, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1AD8XXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1AD8, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1AD9XXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1AD9, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1A80XXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1A80, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame GROWATT_1A82XXXX = {.FD = false,
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.ext_ID = true,
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.DLC = 8,
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.ID = 0x1A82, //TODO
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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unsigned long previousMillis100ms = 0;
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unsigned long previousMillis500ms = 0;
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};
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#endif
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@ -40,6 +40,9 @@ extern const char* name_for_inverter_type(InverterProtocolType type) {
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case InverterProtocolType::GrowattLv:
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return GrowattLvInverter::Name;
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case InverterProtocolType::GrowattWit:
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return GrowattWitInverter::Name;
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case InverterProtocolType::Kostal:
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return KostalInverterProtocol::Name;
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@ -118,6 +121,10 @@ bool setup_inverter() {
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inverter = new GrowattLvInverter();
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break;
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case InverterProtocolType::GrowattWit:
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inverter = new GrowattWitInverter();
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break;
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case InverterProtocolType::Kostal:
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inverter = new KostalInverterProtocol();
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break;
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@ -18,6 +18,7 @@ extern InverterProtocol* inverter;
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#include "FOXESS-CAN.h"
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#include "GROWATT-HV-CAN.h"
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#include "GROWATT-LV-CAN.h"
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#include "GROWATT-WIT-CAN.h"
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#include "KOSTAL-RS485.h"
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#include "PYLON-CAN.h"
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#include "PYLON-LV-CAN.h"
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@ -12,6 +12,7 @@ enum class InverterProtocolType {
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Foxess,
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GrowattHv,
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GrowattLv,
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GrowattWit,
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Kostal,
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Pylon,
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PylonLv,
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