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| # ESP32_r4850g2 | ||
| ESP32 project to control the Huawei R4850G2 Power Supply and a Soyosource inverter for a solar powered LIFEPO4 48V battery pack | ||
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| Information: | ||
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| Power Equation for the whole house: ActGridPower + ActBatPower + SolProd = Used Power | ||
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| Hardware components: | ||
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| Inverter: | ||
| Type: GNT 1200LIM 48 | ||
| MAX: Const. Power: 800W (1200W solar operation) | ||
| Charger: | ||
| Type: Huawei R4850G2 | ||
| BMS: | ||
| Type: JK-BD6A20S8P | ||
| Software V.: V10.XY | ||
| Serial No: 2032812241 | ||
| Battary cells: | ||
| Type: EVE LF90 (3,2V 90AH, Nominal) | ||
| Datasheet No.: LF90-73103 | ||
| Cut off Voltage: 3.65V/2.5V | ||
| Std. charge/Discharge: 1.0C | ||
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| Controller: ESPRESSIF ESP32-WROOM-32U (with ext. Antenna) | ||
| CAN Driver: | ||
| Driver IC: SN65HVD230 | ||
| Serial Driver: | ||
| Driver IC: Max485 CSA (2 pcs. for BMS and Inverter) | ||
| Display: | ||
| Driver: SSD1306 | ||
| Description: 4 Pin 0.96 Zoll OLED IIC Display Modul 128x64; | ||
| I2C Addr.: 0x3C | ||
| Temperature Sensors: | ||
| 1-Wire | ||
| Type: DS18B20 waterproof | ||
| # Solar Energy Manager for ESP32 (SEM.32) | ||
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| Connectors: | ||
| USB upper: | ||
| Pin 2 (RXD/D-) Output A Max 485 USB Driver for inverter, Inverter Input A+ | ||
| Pin 3 (TXD/D+) Output B Max 485 USB Driver for inverter, Inverter Input B- | ||
| SEM.32 (Solar Energy Manager 32) based on ESP32 controller, Soyosource Inverter, Huawei r4850g2 power supply, JK-BMS and 48V battery. It helps You to maximize the usage of self generated solar power. | ||
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| USB Lower: | ||
| Pin 2 (RXD/D-) CAN L | ||
| Pin 3 (TXD/D+) CAN H | ||
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| RJ45 | ||
| Pin 1 (Pair 3) Output A Max 485 USB Driver for BMS, BMS Input A+ | ||
| Pin 2 (Pair 3) Output B Max 485 USB Driver for BMS, BMS Input B- | ||
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| Pinleiste 6 Pol | ||
| Pin1 GPIO26 Temp Sensor | ||
| Pin2 Ground | ||
| Pin3 +3V3 | ||
| Pin4 NC | ||
| Pin5 NC | ||
| Pin6 NC | ||
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| Pinning Controller | ||
| GPIO Function Application Driver | ||
| GPIO00 Boot Push Burron 1 | ||
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| GPIO01 | ||
| GPIO02 | ||
| GPIO03 | ||
| GPIO04 CAN RX Charger SN65HVD230 | ||
| GPIO05 CAN TX Charger SN65HVD230 | ||
| GPIO06 | ||
| GPIO07 | ||
| GPIO08 | ||
| GPIO09 | ||
| GPIO10 | ||
| GPIO11 | ||
| GPIO12 LED Blue, Charging | ||
| GPIO13 LED Green, Discharging | ||
| GPIO14 LED Yellow, Standby | ||
| GPIO15 LED Red, ERROR | ||
| GPIO16 U2RXD Inverter Max485 CSA | ||
| GPIO17 U2TxD Inverter Max485 CSA | ||
| GPIO18 RS485_EN Chip enable, Inverter Max485 CSA | ||
| GPIO19 | ||
| GPIO21 I2C SDA1 Display SSD1306 Address: 0x3C | ||
| GPIO22 I2C SLC1 Display SSD1306 Address: 0x3C | ||
| GPIO23 | ||
| GPIO25 | ||
| GPIO26 DAT Temp. Sensors DS18B20; inc. 4K7 pull up | ||
| GPIO27 | ||
| GPIO32 RS485 RxD BMS Max485 CSA | ||
| GPIO33 RS485 TxD BMS Max485 CSA | ||
| GPIO34 RS485_EN BMS Max485 CSA | ||
| GPIO35 Dig_input Push Button 3 | ||
| GPIO36 Dig_ input Push Button 2 | ||
| GPIO39 LED auxiliary | ||
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| Function: CalculatePower.cpp\int CalculatePower(int ActGridPower, int ActBatPower, int PowResCharger, int MaxPowCharger, int PowResInv, int MaxPowerInv) | ||
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| Positive ActGridPower means, we import power, so we should discharge the battery with the inverter. | ||
| Negative ActGridPower means, we export power, so we can charge the battery. | ||
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| Same logic applies to the battery: | ||
| Positive ActBatPower means, we dischcharge the battery. | ||
| Negative ActBatPower means, we charge the battery. | ||
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| Cases: | ||
| 1) we already charge the battery and still have sufficient solar-power (ActGridPower is negative / less than PowerResCharger) | ||
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| if ActBatPower is negative | ||
| and if ActGridPower is less than PowerResCharger | ||
| than decrease ActBatPower normally (0.3x) | ||
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| 2) we charge the battery but do not have sufficient solar power any more (ActGridPower is positive / bigger than PowResCharger). We have to reduce the charging power fast. | ||
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| if ActBatPower is negative | ||
| and if ActGridPower is more than PowerResCharger | ||
| than increase ActBatPower fast (0.5x) | ||
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| 3) we discharge the battery and we export energy means, we have to reduce fast the inverter power (ActGridPower is negative/ less than PowResInv) | ||
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| if ActBatPower is positive | ||
| and if ActGridPower is negative | ||
| than reduce ActBatPower fast (0.5x) | ||
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| 4) we discharge the battery and we import energy means, we can increase the inverter power (ActGridPower is positive, higher than PowResInv) | ||
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| if ActBatPower is positive | ||
| and if ActGridPower is positive | ||
| than increase ActBatPower normally (0.3x) | ||
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| Finally we have to limit the output power, not to exceed the capabilities of the system. | ||
| (-MaXPowerCharger) < ActBatPower < MaxPowerInv | ||
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| Information: | ||
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| Power Equation for the whole house: ActGridPower + ActBatPower + SolProd = Used Power | ||
| # Main features: | ||
| - control of inverter to minimize power usage out of the grid (over RS485) | ||
| - control of charger to maximize own usage of solar power (over CAN-bus) | ||
| - adjustable power thresholds | ||
| - optional manual control of charging power | ||
| - access to JK-BMS data (over RS485) | ||
| - web GUI | ||
| - wifi configuration portal | ||
| - MQTT client | ||
| - scalable code for new features | ||
| - CAN dbc file for the charger | ||
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| ## Hardware components: | ||
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| - **Inverter:** | ||
| - Type: GNT 1200LIM 48 | ||
| - MAX: Const. Power: 800W (1200W solar operation) | ||
| - **Charger:** | ||
| - Type: Huawei R4850G2 | ||
| - **BMS:** | ||
| - Type: JK-BD6A20S8P | ||
| - Software V.: V10.XY | ||
| - Serial No: 2032812241 | ||
| - **Battery cells:** | ||
| - Type: EVE LF90 (3,2V 90AH, Nominal) | ||
| - Datasheet No.: LF90-73103 | ||
| - Cut off Voltage: 3.65V/2.5V | ||
| - Std. charge/Discharge: 1.0C | ||
| - **Power Meter:** | ||
| - Type: Tasmota based smart meter from [Hitchi](https://www.photovoltaikforum.com/thread/173032-lesekopf-bei-heise-getestet/) | ||
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| - **Controller:** | ||
| - ESPRESSIF ESP32-WROOM-32U (with ext. Antenna) | ||
| - **CAN interface:** | ||
| - Driver IC: SN65HVD230 | ||
| - **RS485 Serial interface:** | ||
| - Driver IC: Max485 CSA (2 pcs. for BMS and Inverter) | ||
| - **0.96 inch OLED IIC 128x64 Display:** | ||
| - Driver: SSD1306 | ||
| - I2C Addr.: 0x3C | ||
| - **Temperature Sensors:** | ||
| - 1-Wire | ||
| - Type: DS18B20 waterproof | ||
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| ## External connectors: | ||
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| **USB upper:** | ||
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| Pin 2 (RXD/D-) Output A Max 485 USB Driver for inverter, Inverter Input A+ | ||
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| Pin 3 (TXD/D+) Output B Max 485 USB Driver for inverter, Inverter Input B- | ||
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| **USB Lower:** | ||
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| Pin 2 (RXD/D-) CAN L | ||
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| Pin 3 (TXD/D+) CAN H | ||
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| **RJ45:** | ||
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| Pin 1 (Pair 3) Output A Max 485 USB Driver for BMS, BMS Input A+ | ||
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| Pin 2 (Pair 3) Output B Max 485 USB Driver for BMS, BMS Input B- | ||
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| **6 pin connector:** | ||
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| Pin1 GPIO26 Temp Sensor | ||
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| Pin2 Ground | ||
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| Pin3 +3V3 | ||
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| Pin4 NC | ||
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| Pin5 NC | ||
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| Pin6 NC | ||
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| ## Pinning Controller | ||
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| | GPIO | Function | Application | Driver | | ||
| | :----- | :-------- | :-------------------- | :------------------------ | | ||
| | GPIO00 | Boot | Push Burron 1 | | | ||
| | GPIO01 | | | | | ||
| | GPIO02 | | | | | ||
| | GPIO03 | | | | | ||
| | GPIO04 | CAN RX | Charger | SN65HVD230 | | ||
| | GPIO05 | CAN TX | Charger | SN65HVD230 | | ||
| | GPIO06 | | | | | ||
| | GPIO07 | | | | | ||
| | GPIO08 | | | | | ||
| | GPIO09 | | | | | ||
| | GPIO10 | | | | | ||
| | GPIO11 | | | | | ||
| | GPIO12 | LED | Blue, Charging | | | ||
| | GPIO13 | LED | Green, Discharging | | | ||
| | GPIO14 | LED | Yellow, Standby | | | ||
| | GPIO15 | LED | Red, ERROR | | | ||
| | GPIO16 | U2RXD | Inverter | Max485 CSA | | ||
| | GPIO17 | U2TxD | Inverter | Max485 CSA | | ||
| | GPIO18 | RS485_EN | Chip enable, Inverter | Max485 CSA | | ||
| | GPIO19 | | | | | ||
| | GPIO21 | I2C SDA1 | Display SSD1306 | Address: 0x3C | | ||
| | GPIO22 | I2C SLC1 | Display SSD1306 | Address: 0x3C | | ||
| | GPIO23 | | | | | ||
| | GPIO25 | | | | | ||
| | GPIO26 | DAT | Temp. Sensors | DS18B20; inc. 4K7 pull up | | ||
| | GPIO27 | | | | | ||
| | GPIO32 | RS485 RxD | BMS | Max485 CSA | | ||
| | GPIO33 | RS485 TxD | BMS | Max485 CSA | | ||
| | GPIO34 | RS485_EN | BMS | Max485 CSA | | ||
| | GPIO35 | Dig_input | Push Button 3 | | | ||
| | GPIO36 | Dig_input | Push Button 2 | | | ||
| | GPIO39 | LED | auxiliary | | | ||
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| # Information: | ||
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| Power Equation for the whole house: $\ ActGridPower + ActBatPower + SolProd = Used Power$ |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,22 @@ | ||
| // rename this file to secrets.h | ||
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| const char g_WIFI_SSID[] = "SSID"; | ||
| const char g_WIFI_Passphrase[] = "password"; | ||
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| char mqtt_server[40] = "192.168.188.80"; | ||
| char mqtt_port[6] = "1883"; | ||
| char current_clamp_ip[40] = "192.168.188.127"; | ||
| char current_clamp_cmd[40] = "/cm?cmnd=status+10"; | ||
| char sensor_resp[20] = "SML"; // or "MT175" | ||
| char sensor_resp_power[20] = "DJ_TPWRCURR"; // or "P" | ||
| bool g_EnableMQTT = true; | ||
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| char solarprognose_token[40] = "token"; // token to get prognosis from http://www.solarprognose.de | ||
| char solarprognose_id[4] = "999"; | ||
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| // | ||
| float lagmorning=0; // time in decimal hours between real sunset and start of PV | ||
| float lagevening=0; // time in decimal hours between end of PV power production and real sunset | ||
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| float laenge = 9.1234; // Postition of PV | ||
| float breite = 48.9999; // Position of PV |
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