#define ARDUINOJSON_ENABLE_COMMENTS 1
#include <stdlib.h>
#include <Arduino.h>
#include <ArduinoJson.h>
#include "LittleFS.h"
#include <DNSServer.h>
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <TimeLib.h>
#include <WiFiUdp.h>
#include <ESP8266httpUpdate.h>
#include <ESPAsyncWebServer.h>
#include <HX711.h>
#include <FTPServer.h>
DynamicJsonDocument settings(1024);
#include <func.c>
FTPServer ftpServer(LittleFS);
DNSServer dnsServer;
AsyncWebServer httpServer(80);
HX711 scale;
time_t measure = 0;
unsigned long measureStartMillis;
File measureFile;
struct measure {
unsigned long millis;
float scale;
double pa;
};
#define MEASURE_BUFFER_SIZE (1024)
struct measure measureBuffer[MEASURE_BUFFER_SIZE]; /* buffer to store measured stuff before writing to littlefs */
#define A2VOLT(ar) (ar*3.3/1023)
#define VOLT2A(vo) (vo*1023/3.3)
#define A2PA(ar) ((A2VOLT(ar)-0.5)*1200000/4.5)
#define TEXT_ENC "text/plain; charset=utf-8"
int do_reload = 0;
void reload (bool w = 0) {
/* stop services unless they were never started, indicate this by w in for example setup() */
Serial.println("reload");
if (!w) {
Serial.println("stopping services: ftp");
ftpServer.stop();
Serial.println("stopping services: http");
httpServer.reset();
Serial.println("stopping services: dns");
dnsServer.stop();
}
/* reload settings */
Serial.println("loading settings");
load_settings();
/* configure pin modes */
pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, HIGH /* LED IS ON when pulled LOW */);
long unsigned int mac;
uint8_t macar[6];
/* bring up AP networking */
/* // setting fancy settings does not work, FUCK ESPRESSIF AND THEIR BLOB RTOS!!!
IPAddress ap_ip(10, 82, 66, 1);
ap_ip.fromString(settings["ap_ip"].as<String>());
IPAddress ap_gateway(10, 82, 66, 1);
ap_gateway.fromString(settings["ap_gw"].as<String>());
IPAddress ap_subnet(255, 255, 255, 0);
ap_subnet.fromString(settings["ap_nm"].as<String>());
WiFi.softAPdisconnect(true);
WiFi.softAPConfig(ap_ip, ap_gateway, ap_subnet);
mac = strtoul(settings["ap_mac"].as<String>().c_str(), NULL, 16);
memcpy(macar, (char *) &mac, 6);
if (strlen(settings["ap_mac"].as<String>().c_str()) == 12)
wifi_set_macaddr(SOFTAP_IF, macar);
*/
Serial.println("access point");
const char * ap_pass = settings["ap_pass"].as<String>().c_str();
if (ap_pass && strlen(ap_pass) < 8)
ap_pass = NULL;
WiFi.mode(WIFI_AP);
WiFi.softAP(settings["ap_ssid"].as<String>().c_str(), ap_pass, settings["ap_ch"].as<int>(), settings["ap_hidden"].as<int>());
Serial.println("WiFi.softAPIP() = " + WiFi.softAPIP().toString());
/* bring up STA networking - if that's desired */
Serial.println("station networking");
const char * sta_ssid = settings["sta_ssid"].as<String>().c_str();
if (strlen(settings["sta_ssid"].as<String>().c_str())) {
Serial.println("setting up wifi station mode");
IPAddress sta_ip(10, 69, 69, 82);
sta_ip.fromString(settings["sta_ip"].as<String>());
IPAddress sta_gw(10, 69, 69, 1);
sta_ip.fromString(settings["sta_gw"].as<String>());
IPAddress sta_nm(255, 255, 255, 0);
sta_ip.fromString(settings["sta_nm"].as<String>());
IPAddress sta_dns1(93, 103, 235, 126);
sta_dns1.fromString(settings["sta_dns1"].as<String>());
IPAddress sta_dns2(193, 2, 1, 66);
sta_dns2.fromString(settings["sta_dns2"].as<String>());
mac = strtoul(settings["sta_mac"].as<String>().c_str(), NULL, 16);
memcpy(macar, (char *) &mac, 6);
if (strlen(settings["sta_mac"].as<String>().c_str()) == 12)
wifi_set_macaddr(STATION_IF, macar);
WiFi.disconnect(true);
WiFi.hostname(settings["sta_host"].as<String>());
const char * sta_pass = settings["sta_pass"].as<String>().c_str();
if (strlen(sta_pass) < 8)
sta_pass = NULL;
WiFi.begin(sta_ssid, sta_pass);
if (settings["sta_static"].as<int>())
if (!WiFi.config(sta_ip, sta_gw, sta_nm, sta_dns1, sta_dns2))
Serial.println("failed to wifi config");
Serial.println(String("wifi local ip: ")+WiFi.localIP().toString());
} else {
WiFi.disconnect();
}
/* start services */
dnsServer.start(53, settings["host"], WiFi.softAPIP());
ftpServer.begin(settings["ftp_user"], settings["ftp_pass"]);
/* web server */
#define ADD_AUTH(h) h.setAuthentication(settings["http_user"], settings["http_pass"]);
auto s = httpServer.serveStatic("/index.html", LittleFS, "/")
.setDefaultFile("index.html");
ADD_AUTH(s);
auto h = httpServer.on("/s", [](AsyncWebServerRequest * r) {
r->send(201, TEXT_ENC, "OK");
ESP.restart();
});
ADD_AUTH(h);
h = httpServer.on("/l", [](AsyncWebServerRequest * r) {
r->send(201, TEXT_ENC, "OK");
do_reload = 1;
});
h = httpServer.on("/m", [](AsyncWebServerRequest * r) {
if (!r->hasParam("n"))
r->send(400, TEXT_ENC, "Manjka parameter n - število sekund meritve");
else
if (!measure) {
measure = atoi(r->getParam("n")->value().c_str());
r->send(201, TEXT_ENC, String("OK")+measure);
} else {
r->send(400, TEXT_ENC, "Meritev že poteka!");
}
});
ADD_AUTH(h);
/* specifični ukazi za meritve: začetek loadcella, kalibracija, tara */
Serial.println(String("začenjam vago na pinih ")+str2pin(settings["scale_dout"].as<String>().c_str())+String(" in ")+
str2pin(settings["scale_sck"].as<String>().c_str()));
scale.begin(str2pin(settings["scale_dout"].as<String>().c_str()), str2pin(settings["scale_sck"].as<String>().c_str()));
Serial.println(String("kalibriram vago na vrednost ")+settings["scale_cal"].as<float>());
scale.set_scale(settings["scale_cal"].as<float>());
scale.set_offset(settings["scale_tar"].as<long>());
if (scale.wait_ready_timeout(1000))
Serial.println(String("skala meri surovo: ")+scale.read_average(10));
else
Serial.println(String("ne morem se povezati na skalo"));
/* specifični http ukazi */
h = httpServer.on("/c", [](AsyncWebServerRequest * r) {
if (!r->hasParam("t") && !r->hasParam("f")) {
r->send(400, TEXT_ENC, "Manjka parameter t - teža na tehtnici ali parameter f - kalibracijski faktor");
} else
if (scale.wait_ready_timeout(1000)) {
float scaleCal;
if (!r->hasParam("f")) {
scale.set_scale();
scale.tare();
scaleCal = scale.get_units(10)/atof(r->getParam("t")->value().c_str());
scale.set_scale(scaleCal);
r->send(200, TEXT_ENC, String("kalibracijski faktor: ")+String(scaleCal));
} else {
scale.set_scale(atof(r->getParam("f")->value().c_str()));
r->send(200, TEXT_ENC, String("teža: "+String(scale.get_units(10))));
}
} else {
r->send(500, TEXT_ENC, "Tehtnica ni najdena");
}
});
ADD_AUTH(h);
h = httpServer.on("/t", [](AsyncWebServerRequest * r) {
if (scale.wait_ready_timeout(1000)) {
scale.tare();
r->send(400, TEXT_ENC, String("razlika, ki jo odštejemo od surove vrednosti, je ")+scale.get_offset());
} else {
r->send(500, TEXT_ENC, "Tehtnica ni najdena.");
}
});
ADD_AUTH(h);
h = httpServer.on("/g", [](AsyncWebServerRequest * r) {
float reading = -1;
long readingraw = -1;
if (scale.wait_ready_timeout(1000)) {
reading = scale.get_units(5);
readingraw = scale.read_average(5);
} else
Serial.println("/g: reading error");
double pa = analogRead(A0);
pa = A2PA(pa);
r->send(200, "application/json", String("{\"p\":")+pa+String(",\"s\":")+reading+String(",\"r\":")+readingraw+String("}"));
});
ADD_AUTH(h);
httpServer.begin();
}
void handleMeasure() {
/* ni časovno omejeno, zapiše se čim več meritev, recimo izvede se enkrat na 10 milisekund, to je idealno. */
/* ob desetsekundni meritvi je to 1000 zajemov, kar znese ob 100 bajtih na zajem 100 kilobajtov na flash. */
httpServer.end();
Serial.println(String("meritev loop started at ")+millis());
measure += time(NULL)+1;
int i = 0;
digitalWrite(LED_BUILTIN, LOW); /* glows in the dark1 */
ESP.wdtDisable();
while (measure >= time(NULL)) {
Serial.println("meritev ...");
if (scale.wait_ready_timeout(1000)) {
measureBuffer[i].millis = millis();
measureBuffer[i].scale = scale.get_units(1);
/* zaradi konstantnega branja analognih vrednosti je pričakovano, da ob meritvi crkne WiFi */
measureBuffer[i].pa = analogRead(A0);
measureBuffer[i].pa = A2PA(measureBuffer[i].pa);
} else
Serial.println("HX711 ni najden.");
if (i >= MEASURE_BUFFER_SIZE) {
Serial.println("zapolnjen measure buffer, dovolj bo");
break;
}
i++;
}
ESP.wdtEnable(2000);
digitalWrite(LED_BUILTIN, HIGH); /* stops glowing */
if (!measureFile.isFile()) {
char filename[32];
snprintf(filename, 32, "meritev%ld.csv", time(NULL));
Serial.println(String("starting measure into file ")+filename);
measureFile = LittleFS.open(filename, "w");
scale.power_up();
measureStartMillis = millis();
}
for (int j = 0; j < i; j++)
measureFile.print(measureBuffer[j].millis+String(",")+measureBuffer[j].scale+String(",")+measureBuffer[j].pa+String("\n"));
measure = 0;
measureFile.close();
Serial.println(String("meritev loop done at ")+millis());
httpServer.begin();
}
void setup () {
Serial.begin(MONITOR_SPEED);
Serial.println("Živ sem!");
LittleFS.begin();
reload(1);
}
void loop () {
if (measure)
handleMeasure();
else {
ftpServer.handleFTP();
dnsServer.processNextRequest();
if (do_reload) {
reload();
do_reload = 0;
}
}
}
