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CG_scale.ino
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/*
------------------------------------------------------------------
CG scale
(c) 2019-2020 by M. Lehmann
------------------------------------------------------------------
*/
#define CGSCALE_VERSION "2.3.4"
/*
******************************************************************
history:
V2.3.4 26.09.24 settings.html text fix SPIFFS to LittleFS
Release 2.3.4
V2.3.3 26.09.24 fix Litt.leFS
V2.3.2 26.09.24 Change from SPIFFS to LittleFS
V2.3.1 26.09.24 Compiler Errors fixes
V2.3 01.03.22 Up to three ESPs can be linked via WLAN. Useful for landing gear scales on engine models
V2.22 28.11.20 fixed RAM problems with JSON
V2.21 27.11.20 bug fixed: recompiled, binary file incorrect
V2.2 01.11.20 Virtual weights built in
V2.12 07.10.20 bug fixed: LR value was displayed in the wrong display position
Voltage for specified battery types deleted
V2.11 18.08.20 code is now compatible with standard OLED displays
and original code base (default pw length = 32)
V2.1 18.07.20 added support for ESP8266 based Wifi Kit 8
(by Pulsar07/ (https://heltec.org/project/wifi-kit-8/)
R.Stransky is a ESP8266 with
a build in OLED 128x32
battery connector with charging management
reset and GPIO0 button
support for a tare button (PIN_TARE_BUTTON)
bug fixed: wifi password now with up to 64 chars
bug fixed: wifi data (ssid/passwd) with special
character (e.g. +) is now supported
for specified battery type, voltage is displayed
using uncompressed html files makes WEB GUI much faster
V2.01 29.01.20 small bug fixes with AVR
V2.0 26.01.20 Webpage rewritten, no bootstrap framework needed
add translation to webpage (en, de)
optimized for measuring with landinggears
updated to ArduinoJson V6
firmware update over web interface
V1.2.1 31.03.19 small bug fixed
values in model database are rounded
mDNS and OTA did not work in AP mode
V1.2 23.02.19 Add OTA (over the air update)
mDNS default enabled
add percentlists for many battery types
memory optimization
V1.1 02.02.19 Supports ESP8266, webpage integrated, STA and AP mode
V1.0 12.01.19 first release
******************************************************************
Software License Agreement (BSD License)
Copyright (c) 2019-2020, Michael Lehmann
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. Neither the name of the copyright holders nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// **** Please UNCOMMENT to choose special hardware *****************
//#define WIFI_KIT_8 //is a ESP8266 based board, with integrated OLED and battery management
// ******************************************************************
// Required libraries, can be installed from the library manager
#include <HX711_ADC.h> // library for the HX711 24-bit ADC for weight scales (https://github.com/olkal/HX711_ADC)
#include <U8g2lib.h> // Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/)
// built-in libraries
#include <EEPROM.h>
#include <Wire.h>
// libraries for ESP8266
#if defined(ESP8266)
#include <LittleFS.h>
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <WiFiClientSecure.h>
#include <ESP8266HTTPClient.h>
#include <ESP8266mDNS.h>
#include <WiFiUdp.h>
#include <ArduinoOTA.h>
#include <ElegantOTA.h>
#include <ArduinoJson.h>
#endif
// load settings
#if defined(__AVR__)
#include "settings_AVR.h"
#elif defined(ESP8266)
#ifdef WIFI_KIT_8
#include "settings_WIFI_KIT_8.h"
#else
#include "settings_ESP8266.h"
#endif
#endif
// HX711 constructor array (dout pin, sck pint):
HX711_ADC LoadCell[] {HX711_ADC(PIN_LOADCELL1_DOUT, PIN_LOADCELL1_PD_SCK), HX711_ADC(PIN_LOADCELL2_DOUT, PIN_LOADCELL2_PD_SCK), HX711_ADC(PIN_LOADCELL3_DOUT, PIN_LOADCELL3_PD_SCK)};
// webserver constructor
#if defined(ESP8266)
ESP8266WebServer server(80);
IPAddress apIP(ip[0], ip[1], ip[2], ip[3]);
WiFiClientSecure httpsClient;
File fsUploadFile; // a File object to temporarily store the received file
#endif
#include "defaults.h"
struct VirtualWeight {
String name;
float cg;
float weight;
bool enabled = false;
};
struct Model {
float distance[3] = {DISTANCE_X1, DISTANCE_X2, DISTANCE_X3};
#if defined(ESP8266)
char name[MAX_MODELNAME_LENGHT + 1] = "";
float targetCGmin = 0;
float targetCGmax = 0;
uint8_t mechanicsType = 0;
VirtualWeight virtualWeight[MAX_VIRTUAL_WEIGHT];
#endif
};
Model model;
// load default values
uint8_t nLoadcells = NUMBER_LOADCELLS;
float calFactorLoadcell[] = {LOADCELL1_CALIBRATION_FACTOR, LOADCELL2_CALIBRATION_FACTOR, LOADCELL3_CALIBRATION_FACTOR};
float resistor[] = {RESISTOR_R1, RESISTOR_R2};
uint8_t batType = BAT_TYPE;
uint8_t batCells = BAT_CELLS;
float refWeight = REF_WEIGHT;
float refCG = REF_CG;
#if defined(ESP8266)
char device_Name[MAX_SSID_PW_LENGHT + 1] = SSID_AP;
char ssid_STA[MAX_SSID_PW_LENGHT + 1] = SSID_STA;
char password_STA[MAX_SSID_PW_LENGHT + 1] = PASSWORD_STA;
char ssid_AP[MAX_SSID_PW_LENGHT + 1] = SSID_AP;
char password_AP[MAX_SSID_PW_LENGHT + 1] = PASSWORD_AP;
char loadCellURL[3][MAX_SSID_PW_LENGHT + 1] = {"","",""};
bool enableUpdate = ENABLE_UPDATE;
bool enableOTA = ENABLE_OTA;
#endif
// declare variables
float weightLoadCell[] = {0, 0, 0};
float lastWeightLoadCell[] = {0, 0, 0};
float weightTotal = 0;
float CG_length = 0;
float CG_trans = 0;
float batVolt = 0;
unsigned long lastTimeMenu = 0;
unsigned long lastTimeLoadcell = 0;
bool updateMenu = true;
int menuPage = 0;
String errMsg[5];
int errMsgCnt = 0;
const uint8_t *oledFontBig;
const uint8_t *oledFontLarge;
const uint8_t *oledFontNormal;
const uint8_t *oledFontSmall;
#if defined(ESP8266)
String updateMsg = "";
bool wifiSTAmode = true;
float gitVersion = -1;
#endif
// Restart CPU
#if defined(__AVR__)
void(* resetCPU) (void) = 0;
#elif defined(ESP8266)
void resetCPU() {}
#endif
// convert time to string
char * TimeToString(unsigned long t)
{
static char str[13];
int h = t / 3600000;
t = t % 3600000;
int m = t / 60000;
t = t % 60000;
int s = t / 1000;
int ms = t - (s * 1000);
sprintf(str, "%02ld:%02d:%02d.%03d", h, m, s, ms);
return str;
}
// Count percentage from cell voltage
int percentBat(float cellVoltage) {
int result = 0;
int elementCount = DATAPOINTS_PERCENTLIST;
byte batTypeArray = batType - 2;
for (int i = 0; i < elementCount; i++) {
if (pgm_read_float( &percentList[batTypeArray][i][1]) == 100 ) {
elementCount = i;
break;
}
}
float cellempty = pgm_read_float( &percentList[batTypeArray][0][0]);
float cellfull = pgm_read_float( &percentList[batTypeArray][elementCount][0]);
if (cellVoltage >= cellfull) {
result = 100;
} else if (cellVoltage <= cellempty) {
result = 0;
} else {
for (int i = 0; i <= elementCount; i++) {
float curVolt = pgm_read_float(&percentList[batTypeArray][i][0]);
if (curVolt >= cellVoltage && i > 0) {
float lastVolt = pgm_read_float(&percentList[batTypeArray][i - 1][0]);
float curPercent = pgm_read_float(&percentList[batTypeArray][i][1]);
float lastPercent = pgm_read_float(&percentList[batTypeArray][i - 1][1]);
result = float((cellVoltage - lastVolt) / (curVolt - lastVolt)) * (curPercent - lastPercent) + lastPercent;
break;
}
}
}
return result;
}
void printConsole(int t, String msg) {
Serial.print(TimeToString(millis()));
Serial.print(" [");
switch (t) {
case T_BOOT:
Serial.print("BOOT");
break;
case T_RUN:
Serial.print("RUN");
break;
case T_ERROR:
Serial.print("ERROR");
break;
case T_WIFI:
Serial.print("WIFI");
break;
case T_UPDATE:
Serial.print("UPDATE");
break;
case T_HTTPS:
Serial.print("HTTPS");
break;
}
Serial.print("] ");
Serial.println(msg);
}
void initOLED() {
oledDisplay.begin();
printConsole(T_BOOT, "init OLED display: " + String(DISPLAY_WIDTH) + String("x") + String(DISPLAY_HIGHT));
#if DISPLAY_HIGHT > 32
oledFontBig = u8g2_font_helvR18_tn;
oledFontLarge = u8g2_font_helvR12_tr;
oledFontNormal = u8g2_font_helvR10_tr;
oledFontSmall = u8g2_font_5x7_tr;
#elif DISPLAY_HIGHT <= 32
oledFontBig = u8g2_font_helvR14_tr;
oledFontLarge = u8g2_font_helvR10_tr;
oledFontNormal = u8g2_font_6x12_tr;
oledFontSmall = u8g2_font_5x7_tr;
#endif
int ylineHeight = DISPLAY_HIGHT / 3;
oledDisplay.firstPage();
do {
oledDisplay.setFont(oledFontLarge);
#if DISPLAY_HIGHT <= 32
oledDisplay.drawXBMP(5, 0, 18, 18, CGImage);
#else
oledDisplay.drawXBMP(20, 12, 18, 18, CGImage);
#endif
oledDisplay.setFont(oledFontLarge);
#if DISPLAY_HIGHT <= 32
oledDisplay.setCursor(30, 12);
#else
oledDisplay.setCursor(45, 28);
#endif
oledDisplay.print(F("CG scale"));
oledDisplay.setFont(oledFontSmall);
#if DISPLAY_HIGHT <= 32
oledDisplay.setCursor(30, 22);
#else
oledDisplay.setCursor(35, 55);
#endif
oledDisplay.print(F("Version: "));
oledDisplay.print(CGSCALE_VERSION);
#if DISPLAY_HIGHT <= 32
oledDisplay.setCursor(5, 31);
#else
oledDisplay.setCursor(20, 64);
#endif
oledDisplay.print(F("(c) 2020 M.Lehmann"));
} while ( oledDisplay.nextPage() );
}
void printOLED(String aLine1, String aLine2, String aLine3) {
int ylineHeight = DISPLAY_HIGHT / 3;
oledDisplay.firstPage();
do {
oledDisplay.setFont(oledFontNormal);
oledDisplay.setCursor(0, ylineHeight * 1);
oledDisplay.print(aLine1);
oledDisplay.setCursor(0, ylineHeight * 2);
oledDisplay.print(aLine2);
oledDisplay.setCursor(0, DISPLAY_HIGHT);
oledDisplay.print(aLine3);
} while ( oledDisplay.nextPage() );
}
void printScaleOLED() {
// print to display
char buff[8];
int pos_weightTotal = 7;
int pos_CG_length = 28;
if (nLoadcells == 2) {
pos_weightTotal = 17;
pos_CG_length = 45;
if (batType == 0) {
pos_weightTotal = 12;
pos_CG_length = 40;
}
}
oledDisplay.firstPage();
do {
if (errMsgCnt == 0) {
// print battery
if (batType > B_OFF) {
oledDisplay.drawXBMP(88, 1, 12, 6, batteryImage);
if (batType == B_VOLT) {
dtostrf(batVolt, 2, 2, buff);
} else {
dtostrf(batVolt, 3, 0, buff);
oledDisplay.drawBox(89, 2, (batVolt / (100 / 8)), 4);
}
oledDisplay.setFont(oledFontSmall);
oledDisplay.setCursor(123 - oledDisplay.getStrWidth(buff), 7);
oledDisplay.print(buff);
if (batType == B_VOLT) {
oledDisplay.print(F("V"));
} else {
oledDisplay.print(F("%"));
}
}
#if defined(ESP8266)
if (DISPLAY_HIGHT <= 32 && (strlen(loadCellURL[LC1]) || strlen(loadCellURL[LC2]) || strlen(loadCellURL[LC3]))) {
oledDisplay.setFont(oledFontBig);
float weight = 0;
for (int i = LC1; i <= LC3; i++) {
if (i < nLoadcells) {
if(strlen(loadCellURL[i]) == 0){
weight = weightLoadCell[i];
}
}
}
dtostrf(weight, 5, 1, buff);
oledDisplay.setCursor(80 - oledDisplay.getStrWidth(buff), 28);
oledDisplay.print(buff);
oledDisplay.print(F(" g"));
}else{
#endif
// print total weight
if (nLoadcells == 1 ) {
oledDisplay.setFont(oledFontBig);
dtostrf(weightTotal, 5, 1, buff);
#if DISPLAY_HIGHT <= 32
oledDisplay.setCursor(80 - oledDisplay.getStrWidth(buff), 28);
#else
oledDisplay.drawXBMP(2, pos_weightTotal, 18, 18, weightImage);
oledDisplay.setCursor(93 - oledDisplay.getStrWidth(buff), pos_weightTotal + 17);
#endif
oledDisplay.print(buff);
oledDisplay.print(F(" g"));
}else{
oledDisplay.setFont(oledFontNormal);
dtostrf(weightTotal, 5, 1, buff);
#if DISPLAY_HIGHT <= 32
oledDisplay.setCursor(1, 18);
oledDisplay.print(F("M = "));
#else
oledDisplay.drawXBMP(2, pos_weightTotal, 18, 18, weightImage);
oledDisplay.setCursor(93 - oledDisplay.getStrWidth(buff), pos_weightTotal + 17);
#endif
oledDisplay.print(buff);
oledDisplay.print(F(" g"));
// print CG longitudinal axis
dtostrf(CG_length, 5, 1, buff);
#if DISPLAY_HIGHT <= 32
oledDisplay.setCursor(1, 32);
oledDisplay.print(F("CG = "));
#else
oledDisplay.drawXBMP(2, pos_CG_length, 18, 18, CGImage);
oledDisplay.setCursor(93 - oledDisplay.getStrWidth(buff), pos_CG_length + 16);
#endif
oledDisplay.print(buff);
oledDisplay.print(F(" mm"));
}
// print CG transverse axis
if (nLoadcells == 3 ) {
#if DISPLAY_HIGHT <= 32
oledDisplay.setCursor(78, 32);
oledDisplay.print(F("LR="));
dtostrf(CG_trans, 3, 0, buff);
#else
dtostrf(CG_trans, 5, 1, buff);
oledDisplay.drawXBMP(2, 47, 18, 18, CGtransImage);
oledDisplay.setCursor(93 - oledDisplay.getStrWidth(buff), 64);
#endif
oledDisplay.print(buff);
oledDisplay.print(F(" mm"));
}
#if defined(ESP8266)
}
#endif
} else {
oledDisplay.setFont(oledFontSmall);
for (int i = 1; i <= errMsgCnt; i++) {
oledDisplay.setCursor(0, 7 * i);
oledDisplay.print(errMsg[i]);
}
}
} while ( oledDisplay.nextPage() );
}
#ifdef PIN_TARE_BUTTON
void handleTareBtn() {
static unsigned long lastTaraBtn = 0;
if ((millis() - lastTaraBtn) > 20) {
lastTaraBtn = millis();
static int tareBtnCnt = 0;
if (digitalRead(PIN_TARE_BUTTON)) {
tareBtnCnt = 0;
} else {
tareBtnCnt++;
if (tareBtnCnt > 10) {
printOLED("TARE ==>", " tare load cells ...","");
// avoid keybounce
tareBtnCnt = -1000;
tareLoadcells();
delay(2000);
}
}
}
}
#endif
// save calibration factor
void saveCalFactor(int nLC) {
LoadCell[nLC].setCalFactor(calFactorLoadcell[nLC]);
EEPROM.put(P_LOADCELL1_CALIBRATION_FACTOR + (nLC * sizeof(float)), calFactorLoadcell[nLC]);
#if defined(ESP8266)
EEPROM.commit();
#endif
}
void updateLoadcells() {
for (int i = LC1; i <= LC3; i++) {
if (i < nLoadcells) {
LoadCell[i].update();
}
}
}
void tareLoadcells() {
for (int i = LC1; i <= LC3; i++) {
if (i < nLoadcells) {
#if defined(ESP8266)
if(strlen(loadCellURL[i]) == 0){
LoadCell[i].tare();
}
#else
LoadCell[i].tare();
#endif
}
}
}
void printNewValueText() {
Serial.print(F("Set new value:"));
}
// run auto calibration
bool runAutoCalibrate() {
Serial.print(F("\nAutocalibration is running"));
for (int i = 0; i <= 20; i++) {
Serial.print(F("."));
delay(100);
}
// calculate weight
float toWeightLoadCell[] = {0, 0, 0};
toWeightLoadCell[LC2] = ((refCG - model.distance[X1]) * refWeight) / model.distance[X2];
toWeightLoadCell[LC1] = refWeight - toWeightLoadCell[LC2];
if (nLoadcells == 3) {
toWeightLoadCell[LC1] = toWeightLoadCell[LC1] / 2;
toWeightLoadCell[LC3] = toWeightLoadCell[LC1];
}
// calculate calibration factors
for (int i = LC1; i <= LC3; i++) {
calFactorLoadcell[i] = calFactorLoadcell[i] / (toWeightLoadCell[i] / weightLoadCell[i]);
saveCalFactor(i);
}
// finish
Serial.println(F("done"));
return true;
}
// check if a loadcell has error
bool getLoadcellError() {
bool err = false;
for (int i = LC1; i <= LC3; i++) {
if (i < nLoadcells) {
if (LoadCell[i].getTareTimeoutFlag()) {
String msg = "ERROR: Timeout TARE Lc" + String(i + 1);
errMsg[++errMsgCnt] = msg + "\n";
#if defined(ESP8266)
printConsole(T_ERROR, msg);
#endif
err = true;
}
}
}
return err;
}
#if defined(ESP8266)
void writeModelData(JsonObject object) {
char buff[8];
String stringBuff;
dtostrf(weightTotal, 5, 1, buff);
stringBuff = buff;
stringBuff.trim();
object["wt"] = stringBuff;
dtostrf(CG_length, 5, 1, buff);
stringBuff = buff;
stringBuff.trim();
object["cg"] = stringBuff;
dtostrf(CG_trans, 5, 1, buff);
stringBuff = buff;
stringBuff.trim();
object["cglr"] = stringBuff;
object["x1"] = model.distance[X1];
object["x2"] = model.distance[X2];
object["x3"] = model.distance[X3];
object["cgmin"] = model.targetCGmin;
object["cgmax"] = model.targetCGmax;
object["mType"] = model.mechanicsType;
JsonArray virtw = object.createNestedArray("virtual");
for (int i=0; i < MAX_VIRTUAL_WEIGHT; i++){
JsonArray virtWeight = virtw.createNestedArray();
virtWeight.add(model.virtualWeight[i].name);
virtWeight.add(model.virtualWeight[i].cg);
virtWeight.add(model.virtualWeight[i].weight);
virtWeight.add(model.virtualWeight[i].enabled);
}
}
// save model to json file
bool saveModelJson(String modelName) {
if (modelName.length() > MAX_MODELNAME_LENGHT) {
return false;
}
DynamicJsonDocument jsonDoc(JSONDOC_SIZE);
if (LittleFS.exists(MODEL_FILE)) {
// read json file
File f = LittleFS.open(MODEL_FILE, "r");
auto error = deserializeJson(jsonDoc, f);
f.close();
if (error) {
printConsole(T_ERROR, "save JSON: " + String(error.c_str()));
return false;
}
// check if model exists
if (jsonDoc.containsKey(modelName)) {
writeModelData(jsonDoc[modelName]);
} else {
// otherwise create new
writeModelData(jsonDoc.createNestedObject(modelName));
}
// write to file
if (!error) {
f = LittleFS.open(MODEL_FILE, "w");
serializeJson(jsonDoc, f);
f.close();
} else {
printConsole(T_ERROR, "save JSON: " + String(error.c_str()));
return false;
}
} else {
// creat new json
writeModelData(jsonDoc.createNestedObject(modelName));
// write to file
if (!jsonDoc.isNull()) {
File f = LittleFS.open(MODEL_FILE, "w");
serializeJson(jsonDoc, f);
f.close();
} else {
printConsole(T_ERROR, "JSON is null ");
return false;
}
}
return true;
}
// read model data from json file
bool openModelJson(String modelName) {
DynamicJsonDocument jsonDoc(JSONDOC_SIZE);
if (LittleFS.exists(MODEL_FILE)) {
// read json file
File f = LittleFS.open(MODEL_FILE, "r");
auto error = deserializeJson(jsonDoc, f);
f.close();
if (error) {
printConsole(T_ERROR, "open JSON: " + String(error.c_str()));
return false;
}
// check if model exists
if (jsonDoc.containsKey(modelName)) {
// load parameters from model
model.distance[X1] = jsonDoc[modelName]["x1"];
model.distance[X2] = jsonDoc[modelName]["x2"];
model.distance[X3] = jsonDoc[modelName]["x3"];
model.targetCGmin = jsonDoc[modelName]["cgmin"];
model.targetCGmax = jsonDoc[modelName]["cgmax"];
model.mechanicsType = jsonDoc[modelName]["mType"];
JsonArray virtw = jsonDoc[modelName]["virtual"];
if(virtw){
for (int i=0; i < MAX_VIRTUAL_WEIGHT; i++){
model.virtualWeight[i].name = virtw[i][0].as<String>();
model.virtualWeight[i].cg = virtw[i][1].as<int>();
model.virtualWeight[i].weight = virtw[i][2].as<int>();
model.virtualWeight[i].enabled = virtw[i][3].as<bool>();
}
}
} else {
printConsole(T_ERROR, "Model name not found");
return false;
}
// save current model name to eeprom
modelName.toCharArray(model.name, MAX_MODELNAME_LENGHT + 1);
EEPROM.put(P_MODELNAME, model.name);
EEPROM.commit();
return true;
}
printConsole(T_ERROR, "Modelfile not exists");
return false;
}
// delete model from json file
bool deleteModelJson(String modelName) {
DynamicJsonDocument jsonDoc(JSONDOC_SIZE);
if (LittleFS.exists(MODEL_FILE)) {
// read json file
File f = LittleFS.open(MODEL_FILE, "r");
auto error = deserializeJson(jsonDoc, f);
f.close();
if (error) {
printConsole(T_ERROR, "delete JSON: " + String(error.c_str()));
return false;
}
// check if model exists
if (jsonDoc.containsKey(modelName)) {
jsonDoc.remove(modelName);
} else {
printConsole(T_ERROR, "Model name not found");
return false;
}
// if no models in json, kill it
if (jsonDoc.size() == 0) {
LittleFS.remove(MODEL_FILE);
} else {
// write to file
if (!jsonDoc.isNull()) {
File f = LittleFS.open(MODEL_FILE, "w");
serializeJson(jsonDoc, f);
f.close();
} else {
printConsole(T_ERROR, "JSON is null ");
return false;
}
}
return true;
}
printConsole(T_ERROR, "Modelfile not exists");
return false;
}
// send headvalues to client
void getHead() {
String response = ssid_AP;
response += "&";
for (int i = 1; i <= errMsgCnt; i++) {
response += errMsg[i];
}
response += "&";
response += CGSCALE_VERSION;
response += "&";
response += gitVersion;
server.send(200, "text/html", response);
}
// send values to client
void getValue() {
char buff[8];
String response = "";
dtostrf(weightTotal, 5, 1, buff);
response += buff;
response += "g&";
dtostrf(CG_length, 5, 1, buff);
response += buff;
response += "mm&";
dtostrf(CG_trans, 5, 1, buff);
response += buff;
response += "mm&";
if (batType == B_VOLT) {
dtostrf(batVolt, 5, 2, buff);
response += buff;
response += "V";
} else {
dtostrf(batVolt, 5, 0, buff);
response += buff;
response += "%";
}
server.send(200, "text/html", response);
}
// send raw values to client
void getRawValue() {
char buff[8];
String response = "";
dtostrf(weightLoadCell[LC1], 5, 1, buff);
response += buff;
response += "g&";
dtostrf(weightLoadCell[LC2], 5, 1, buff);
response += buff;
response += "g&";
dtostrf(weightLoadCell[LC3], 5, 1, buff);
response += buff;
response += "g&";
if (batType == B_VOLT) {
dtostrf(batVolt, 5, 2, buff);
response += buff;
response += "V";
} else {
dtostrf(batVolt, 5, 0, buff);
response += buff;
response += "%";
}
server.send(200, "text/html", response);
}
// send parameters to client
void getParameter() {
char buff[8];
String response = "";
float weightTotal_saved = 0;
float CG_length_saved = 0;
float CG_trans_saved = 0;
model.targetCGmin = 0;
model.targetCGmax = 0;
DynamicJsonDocument jsonDoc(JSONDOC_SIZE);
if (LittleFS.exists(MODEL_FILE)) {
// read json file
File f = LittleFS.open(MODEL_FILE, "r");
auto error = deserializeJson(jsonDoc, f);
f.close();
// check if model exists
if (!error && jsonDoc.containsKey(model.name)) {
weightTotal_saved = jsonDoc[model.name]["wt"];
CG_length_saved = jsonDoc[model.name]["cg"];
CG_trans_saved = jsonDoc[model.name]["cglr"];
model.targetCGmin = jsonDoc[model.name]["cgmin"];
model.targetCGmax = jsonDoc[model.name]["cgmax"];
model.mechanicsType = jsonDoc[model.name]["mType"];
}
}
// parameter list
response += nLoadcells;
response += "&";
for (int i = X1; i <= X3; i++) {
response += model.distance[i];
response += "&";
}
response += refWeight;
response += "&";
response += refCG;
response += "&";
for (int i = LC1; i <= LC3; i++) {
response += calFactorLoadcell[i];
response += "&";
}
for (int i = R1; i <= R2; i++) {
response += resistor[i];
response += "&";
}
response += batType;
response += "&";
response += batCells;
response += "&";
response += ssid_STA;
response += "&";
response += password_STA;
response += "&";
response += ssid_AP;
response += "&";
response += password_AP;
response += "&";
response += model.name;
response += "&";
dtostrf(weightTotal_saved, 5, 1, buff);
response += buff;
response += "g&";
dtostrf(CG_length_saved, 5, 1, buff);
response += buff;
response += "mm&";
dtostrf(CG_trans_saved, 5, 1, buff);
response += buff;
response += "mm&";
response += model.targetCGmin;
response += "&";
response += model.targetCGmax;
response += "&";
response += model.mechanicsType;
response += "&";
response += enableUpdate;
response += "&";
response += enableOTA;
response += "&";
response += device_Name;
for (int i = LC1; i <= LC3; i++) {
response += "&";
response += loadCellURL[LC1];
}
server.send(200, "text/html", response);
}
// send virtual weights to client
void getVirtualWeight() {
String response = "";
DynamicJsonDocument jsonDoc(JSONDOC_SIZE);
JsonArray virtw = jsonDoc.createNestedArray("virtual");
for (int i=0; i < MAX_VIRTUAL_WEIGHT; i++){
JsonArray virtWeight = virtw.createNestedArray();
virtWeight.add(model.virtualWeight[i].name);
virtWeight.add(model.virtualWeight[i].cg);
virtWeight.add(model.virtualWeight[i].weight);
virtWeight.add(model.virtualWeight[i].enabled);
}
serializeJson(jsonDoc["virtual"], response);
server.send(200, "text/html", response);
}
// send available WiFi networks to client
void getWiFiNetworks() {
bool ssidSTAavailable = false;
String response = "";
int n = WiFi.scanNetworks();
if (n > 0) {
for (int i = 0; i < n; ++i) {
response += WiFi.SSID(i);
if (WiFi.SSID(i) == ssid_STA) ssidSTAavailable = true;
if (i < n - 1) response += "&";
}
if (!ssidSTAavailable) {
response += "&";
response += ssid_STA;
}
}
server.send(200, "text/html", response);
}
// save parameters
void saveParameter() {
if (server.hasArg("nLoadcells")) nLoadcells = server.arg("nLoadcells").toInt();
if (server.hasArg("distanceX1")) model.distance[X1] = server.arg("distanceX1").toFloat();
if (server.hasArg("distanceX2")) model.distance[X2] = server.arg("distanceX2").toFloat();
if (server.hasArg("distanceX3")) model.distance[X3] = server.arg("distanceX3").toFloat();
if (server.hasArg("refWeight")) refWeight = server.arg("refWeight").toFloat();
if (server.hasArg("refCG")) refCG = server.arg("refCG").toFloat();
if (server.hasArg("calFactorLoadcell1")) calFactorLoadcell[LC1] = server.arg("calFactorLoadcell1").toFloat();
if (server.hasArg("calFactorLoadcell2")) calFactorLoadcell[LC2] = server.arg("calFactorLoadcell2").toFloat();
if (server.hasArg("calFactorLoadcell3")) calFactorLoadcell[LC3] = server.arg("calFactorLoadcell3").toFloat();
if (server.hasArg("resistorR1")) resistor[R1] = server.arg("resistorR1").toFloat();
if (server.hasArg("resistorR2")) resistor[R2] = server.arg("resistorR2").toFloat();
if (server.hasArg("batType")) batType = server.arg("batType").toInt();
if (server.hasArg("batCells")) batCells = server.arg("batCells").toInt();
if (server.hasArg("ssid_STA")) server.arg("ssid_STA").toCharArray(ssid_STA, MAX_SSID_PW_LENGHT + 1);
if (server.hasArg("password_STA")) server.arg("password_STA").toCharArray(password_STA, MAX_SSID_PW_LENGHT + 1);
if (server.hasArg("ssid_AP")) server.arg("ssid_AP").toCharArray(ssid_AP, MAX_SSID_PW_LENGHT + 1);
if (server.hasArg("password_AP")) server.arg("password_AP").toCharArray(password_AP, MAX_SSID_PW_LENGHT + 1);
if (server.hasArg("mechanicsType")) model.mechanicsType = server.arg("mechanicsType").toInt();
if (server.hasArg("enableUpdate")) enableUpdate = server.arg("enableUpdate").toInt();
if (server.hasArg("enableOTA")) enableOTA = server.arg("enableOTA").toInt();
if (server.hasArg("device_Name")) server.arg("device_Name").toCharArray(device_Name, MAX_SSID_PW_LENGHT + 1);
if (server.hasArg("lc1_URL")) server.arg("lc1_URL").toCharArray(loadCellURL[LC1], MAX_SSID_PW_LENGHT + 1);
if (server.hasArg("lc2_URL")) server.arg("lc2_URL").toCharArray(loadCellURL[LC2], MAX_SSID_PW_LENGHT + 1);
if (server.hasArg("lc3_URL")) server.arg("lc3_URL").toCharArray(loadCellURL[LC3], MAX_SSID_PW_LENGHT + 1);
EEPROM.put(P_NUMBER_LOADCELLS, nLoadcells);
for (int i = LC1; i <= LC3; i++) {
EEPROM.put(P_DISTANCE_X1 + (i * sizeof(float)), model.distance[i]);
saveCalFactor(i);
}
EEPROM.put(P_REF_WEIGHT, refWeight);
EEPROM.put(P_REF_CG, refCG);