I am working on a project to control a Zendure SolarFlow 800 Pro using an ESP32.
My ESP32 reads the power meter to determine the current power flow. A positive value means the house is importing power from the grid, while a negative value means excess power is being exported to the grid.
I can successfully read data from the SolarFlow (e.g. battery SOC, solar input power, and output power), but I cannot send commands to change the output power supplied to the house. Although my HTTP/MQTT request appears to be sent successfully, the SolarFlow does not change its output.
Below are some additional information and code snippets.
Has anyone encountered this issue before or has an idea what I might be doing wrong?
the loop:
if (firstRun) {
firstRun = 0;
readSolarflow();
Serial.printf(“Accu: %u %%\n”, gBatterySOC);
Serial.printf(“Solar: %u W\n”, gSolarPower);
Serial.printf(“FeedPower: %u W\n”, gFeedPower);
gMeterVal = getMeter();
Serial.printf("Meter: %i W\n", gMeterVal);
writeSmartMode();
feedPower(234);
readSolarflow();
the function
void writeSmartMode(){
HTTPClient http;
String url = String(“http://”) + zendureIp + “/properties/write”;
http.begin(url);
http.addHeader(“Content-Type”, “application/json”);
// JSON-Body aufbauen: { “sn”: “…”, “properties”: { “outputLimit”: } }
JsonDocument doc;
doc[“sn”] = zendureSn;
JsonObject props = doc[“properties”].to();
props[“smartMode”] = 0;
String body;
serializeJson(doc, body);
Serial.print("Sende HTTP POST: ");
Serial.println(url);
Serial.print("Body: ");
Serial.println(body);
int httpCode = http.POST(body);
String response = http.getString();
Serial.printf(“HTTP-Code: %d\n”, httpCode);
Serial.println(“Antwort:”);
Serial.println(response);
http.end();
}
the Log:
WLAN verbunden, IP ESP32: 192.168.178.35
{“timestamp”:1786121190,“messageId”:43,“sn”:“zendureSN”,“version”:3,“product”:“solarFlow800Pro”,“properties”:{“heatState”:0,“packInputPower”:0,“outputPackPower”:0,“outputHomePower”:221,“remainOutTime”:23820,“packState”:2,“electricLevel”:99,“gridInputPower”:0,“solarInputPower”:250,“solarPower1”:125,“solarPower2”:125,“solarPower3”:0,“solarPower4”:0,“pass”:2,“reverseState”:1,“socStatus”:0,“hyperTmp”:3141,“gridOffPower”:0,“dcStatus”:0,“pvStatus”:0,“acStatus”:1,“dataReady”:1,“gridState”:1,“BatVolt”:4996,“socLimit”:1,“faultLevel”:2,“writeRsp”:0,“acMode”:2,“inputLimit”:0,“outputLimit”:0,“socSet”:1000,“minSoc”:100,“gridStandard”:0,“gridReverse”:1,“inverseMaxPower”:800,“lampSwitch”:1,“gridOffMode”:2,“IOTState”:2,“Fanmode”:1,“Fanspeed”:0,“bindstate”:0,“factoryModeState”:0,“OTAState”:0,“oldMode”:0,“VoltWakeup”:0,“ts”:1786121038,“tsZone”:14,“smartMode”:1,“chargeMaxLimit”:800,“phaseSwitch”:2,“batCalTime”:60,“socCompSwitch”:0,“packNum”:1,“rssi”:-64,“is_error”:0},“packData”:[{“sn”:“SN”,“packType”:300,“socLevel”:99,“state”:2,“power”:4,“maxTemp”:3081,“totalVol”:4980,“batcur”:65535,“maxVol”:332,“minVol”:331,“softVersion”:4354}]}
Accu: 99 %
Solar: 250 W
FeedPower: 221 W
Meter: -64 W
Sende HTTP POST: to 192.168.178.64/properties/write
Body: {“sn”:“zendureSN”,“properties”:{“smartMode”:0}}
HTTP-Code: 200
Antwort:
{“timestamp”:1786121195,“messageId”:44,“success”:true,“code”:200,“sn”:“zendureSN”}
Sende HTTP POST: to 192.168.178.64/properties/write
Body: {“sn”:“zendureSN”,“properties”:{“smartMode”:1,“acMode”:1,“outputLimit”:0}}
HTTP-Code: 200
Antwort: {“timestamp”:1786121196,“messageId”:45,“success”:true,“code”:200,“sn”:“zendureSN”}
Sende HTTP POST: to 192.168.178.64/properties/write
Body: {“sn”:“zendureSN”,“properties”:{“smartMode”:1,“acMode”:2,“outputLimit”:234}}
HTTP-Code: 200
Antwort: {“timestamp”:1786121196,“messageId”:46,“success”:true,“code”:200,“sn”:“zendureSN”}
{“timestamp”:1786121200,“messageId”:47,“sn”:“zendureSN”,“version”:3,“product”:“solarFlow800Pro”,“properties”:{“heatState”:0,“packInputPower”:0,“outputPackPower”:0,“outputHomePower”:0,“remainOutTime”:23820,“packState”:2,“electricLevel”:99,“gridInputPower”:0,“solarInputPower”:0,“solarPower1”:0,“solarPower2”:0,“solarPower3”:0,“solarPower4”:0,“pass”:0,“reverseState”:1,“socStatus”:0,“hyperTmp”:3141,“gridOffPower”:0,“dcStatus”:0,“pvStatus”:0,“acStatus”:0,“dataReady”:1,“gridState”:1,“BatVolt”:4996,“socLimit”:1,“faultLevel”:2,“writeRsp”:0,“acMode”:2,“inputLimit”:0,“outputLimit”:234,“socSet”:1000,“minSoc”:100,“gridStandard”:0,“gridReverse”:1,“inverseMaxPower”:800,“lampSwitch”:1,“gridOffMode”:2,“IOTState”:2,“Fanmode”:1,“Fanspeed”:0,“bindstate”:0,“factoryModeState”:0,“OTAState”:0,“oldMode”:0,“VoltWakeup”:0,“ts”:1786121038,“tsZone”:14,“smartMode”:1,“chargeMaxLimit”:800,“phaseSwitch”:2,“batCalTime”:60,“socCompSwitch”:0,“packNum”:1,“rssi”:-62,“is_error”:0},“packData”:[{“sn”:“SN”,“packType”:300,“socLevel”:99,“state”:2,“power”:4,“maxTemp”:3081,“totalVol”:4980,“batcur”:65535,“maxVol”:332,“minVol”:331,“softVersion”:4354}]}
Unfortunately, the output was not changed, and no power was supplied to the house.
What is wrong? I think the Zendure device needs to be configured in some way to work, but how?
