Hi guys so i have a project i am busy with and wanted to try arduino. i am totally new to the arduino world and i kinda have no idea what im doing. i want to build a simple scale that when it reached say 1kg it should send me a sms. i have the arduino uno, a hx711, a dc to dc buck converter and a sim800l module. with that i took a bathroom scale apart and wired it up with the hx711 and downloaded the calibration code and it works perfect. but my problem lays when i use the full hx711 library and to combine just a piece of the adafruit fona library it just gives all errors. now i have no idea how to code. can someone can please help me with fixing my code.? i dont know what i am doing wrong or how to fix it. attached i have my code so far.
so my code. basically i just took the adafruit fona test library for the gsm and the hx711 library for the scale and used a part to send a sms and copied and paste it to the hx711 library but i keep on getting error codes. The error i am getting now is:
case label "s" not within a switch statement
when it complies the error is close to the bottom of the code so i assume everything on further up is ok but also dont know if i need to add something in futher up.
#include <Adafruit_FONA.h>
#define FONA_RX 2
#define FONA_TX 3
#define FONA_RST 4
// this is a large buffer for replies
char replybuffer[255];
// We default to using software serial. If you want to use hardware serial
// (because softserial isnt supported) comment out the following three lines
// and uncomment the HardwareSerial line
#include <SoftwareSerial.h>
SoftwareSerial fonaSS = SoftwareSerial(FONA_TX, FONA_RX);
SoftwareSerial *fonaSerial = &fonaSS;
// Hardware serial is also possible!
// HardwareSerial *fonaSerial = &Serial1;
// Use this for FONA 800 and 808s
Adafruit_FONA fona = Adafruit_FONA(FONA_RST);
// Use this one for FONA 3G
//Adafruit_FONA_3G fona = Adafruit_FONA_3G(FONA_RST);
uint8_t readline(char *buff, uint8_t maxbuff, uint16_t timeout = 0);
uint8_t type;
/**
*
* HX711 library for Arduino - example file
* https://github.com/bogde/HX711
*
* MIT License
* (c) 2018 Bogdan Necula
*
**/
#include "HX711.h"
// HX711 circuit wiring
const int LOADCELL_DOUT_PIN = 5;
const int LOADCELL_SCK_PIN = 6;
HX711 scale;
void setup() {
Serial.begin(38400);
Serial.println("HX711 Demo");
Serial.println("Initializing the scale");
// Initialize library with data output pin, clock input pin and gain factor.
// Channel selection is made by passing the appropriate gain:
// - With a gain factor of 64 or 128, channel A is selected
// - With a gain factor of 32, channel B is selected
// By omitting the gain factor parameter, the library
// default "128" (Channel A) is used here.
scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
Serial.println("Before setting up the scale:");
Serial.print("read: \t\t");
Serial.println(scale.read()); // print a raw reading from the ADC
Serial.print("read average: \t\t");
Serial.println(scale.read_average(20)); // print the average of 20 readings from the ADC
Serial.print("get value: \t\t");
Serial.println(scale.get_value(5)); // print the average of 5 readings from the ADC minus the tare weight (not set yet)
Serial.print("get units: \t\t");
Serial.println(scale.get_units(5), 1); // print the average of 5 readings from the ADC minus tare weight (not set) divided
// by the SCALE parameter (not set yet)
scale.set_scale(2280.f); // this value is obtained by calibrating the scale with known weights; see the README for details
scale.tare(); // reset the scale to 0
Serial.println("After setting up the scale:");
Serial.print("read: \t\t");
Serial.println(scale.read()); // print a raw reading from the ADC
Serial.print("read average: \t\t");
Serial.println(scale.read_average(20)); // print the average of 20 readings from the ADC
Serial.print("get value: \t\t");
Serial.println(scale.get_value(5)); // print the average of 5 readings from the ADC minus the tare weight, set with tare()
Serial.print("get units: \t\t");
Serial.println(scale.get_units(5), 1); // print the average of 5 readings from the ADC minus tare weight, divided
// by the SCALE parameter set with set_scale
Serial.println("Readings:");
}
void loop() {
Serial.print("one reading:\t");
Serial.print(scale.get_units(), 1);
Serial.print("\t| average:\t");
Serial.println(scale.get_units(10), 1);
if ("scale.get_units()>30")
{
// send an SMS!
char sendto[21], message[141];
flushSerial();
Serial.print(F("Send to #"));
readline(sendto, 20);
Serial.println(sendto);
Serial.print(F("Type out one-line message (140 char): "));
readline(message, 140);
Serial.println(message);
if (!fona.sendSMS(sendto, message)) {
Serial.println(F("Failed"));
} else {
Serial.println(F("Sent!"));
}
{
scale.power_down(); // put the ADC in sleep mode
delay(5000);
scale.power_up();
}
if ("scale.get_units()>30")
This looks very wrong.
I suspect that it should be
if (scale.get_units()>30)
The quotation marks certainly should not be there
thanks i will certainly change that. i keep on getting a error saying "flushserial was not declared in this scope" do you perhaps know why?
Darren1827:
i keep on getting a error saying "flushserial was not declared in this scope" do you perhaps know why?
It is because you are trying to call the flushSerial() function, but it does not exist in the program
ok i am a bit lost. i copied it directly from the fona test library. should i just remove that line instead?
if i remove the line that says flushserial i get and error
exit status 1
Error compiling for board Arduino/Genuino Uno.
exit status 1
Error compiling for board Arduino/Genuino Uno.
Please post the whole error message. The error window in the IDE even has a handy "Copy error messages" button
Arduino: 1.8.9 (Windows 7), Board: "Arduino/Genuino Uno"
C:\Users\User\AppData\Local\Temp\ccbLJAKm.ltrans0.ltrans.o: In function `loop':
C:\Users\User\Documents\Arduino\my_scale_1/my_scale_1.ino:109: undefined reference to `readline(char*, unsigned char, unsigned int)'
C:\Users\User\Documents\Arduino\my_scale_1/my_scale_1.ino:112: undefined reference to `readline(char*, unsigned char, unsigned int)'
collect2.exe: error: ld returned 1 exit status
exit status 1
Error compiling for board Arduino/Genuino Uno.
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
Do you have a function named readline() in your program ?
yes i do. i copied and paste it exactly from the library.
// send an SMS!
char sendto[21], message[141];
Serial.print(F("phone number"));
readline(sendto, 20);
Serial.println(sendto);
Serial.print(F("hello world "));
readline(message, 140);
Serial.println(message);
if (!fona.sendSMS(sendto, message)) {
Serial.println(F("Failed"));
} else {
Serial.println(F("Sent!"));
That snippet of code calls a function named readline(), but I do not see the actual function in your code.
The function definition is there
uint8_t readline(char *buff, uint8_t maxbuff, uint16_t timeout = 0);
but not the function itself
i totally understand what you saying but i dont know what more to add to it.
this is the first piece fona test library i used. what am i missing here?
/***************************************************
This is an example for our Adafruit FONA Cellular Module
Designed specifically to work with the Adafruit FONA
----> http://www.adafruit.com/products/1946
----> http://www.adafruit.com/products/1963
----> http://www.adafruit.com/products/2468
----> http://www.adafruit.com/products/2542
These cellular modules use TTL Serial to communicate, 2 pins are
required to interface
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
BSD license, all text above must be included in any redistribution
****************************************************/
/*
THIS CODE IS STILL IN PROGRESS!
Open up the serial console on the Arduino at 115200 baud to interact with FONA
Note that if you need to set a GPRS APN, username, and password scroll down to
the commented section below at the end of the setup() function.
*/
#include "Adafruit_FONA.h"
#define FONA_RX 2
#define FONA_TX 3
#define FONA_RST 4
// this is a large buffer for replies
char replybuffer[255];
// We default to using software serial. If you want to use hardware serial
// (because softserial isnt supported) comment out the following three lines
// and uncomment the HardwareSerial line
#include <SoftwareSerial.h>
SoftwareSerial fonaSS = SoftwareSerial(FONA_TX, FONA_RX);
SoftwareSerial *fonaSerial = &fonaSS;
// Hardware serial is also possible!
// HardwareSerial *fonaSerial = &Serial1;
// Use this for FONA 800 and 808s
Adafruit_FONA fona = Adafruit_FONA(FONA_RST);
// Use this one for FONA 3G
//Adafruit_FONA_3G fona = Adafruit_FONA_3G(FONA_RST);
uint8_t readline(char *buff, uint8_t maxbuff, uint16_t timeout = 0);
uint8_t type;
void setup() {
while (!Serial);
Serial.begin(115200);
Serial.println(F("FONA basic test"));
Serial.println(F("Initializing....(May take 3 seconds)"));
fonaSerial->begin(4800);
if (! fona.begin(*fonaSerial)) {
Serial.println(F("Couldn't find FONA"));
while (1);
}
type = fona.type();
Serial.println(F("FONA is OK"));
Serial.print(F("Found "));
switch (type) {
case FONA800L:
Serial.println(F("FONA 800L")); break;
case FONA800H:
Serial.println(F("FONA 800H")); break;
case FONA808_V1:
Serial.println(F("FONA 808 (v1)")); break;
case FONA808_V2:
Serial.println(F("FONA 808 (v2)")); break;
case FONA3G_A:
Serial.println(F("FONA 3G (American)")); break;
case FONA3G_E:
Serial.println(F("FONA 3G (European)")); break;
default:
Serial.println(F("???")); break;
}
// Print module IMEI number.
char imei[16] = {0}; // MUST use a 16 character buffer for IMEI!
uint8_t imeiLen = fona.getIMEI(imei);
if (imeiLen > 0) {
Serial.print("Module IMEI: "); Serial.println(imei);
}
// Optionally configure a GPRS APN, username, and password.
// You might need to do this to access your network's GPRS/data
// network. Contact your provider for the exact APN, username,
// and password values. Username and password are optional and
// can be removed, but APN is required.
//fona.setGPRSNetworkSettings(F("your APN"), F("your username"), F("your password"));
// Optionally configure HTTP gets to follow redirects over SSL.
// Default is not to follow SSL redirects, however if you uncomment
// the following line then redirects over SSL will be followed.
//fona.setHTTPSRedirect(true);
printMenu();
}
void printMenu(void) {
Serial.println(F("-------------------------------------"));
Serial.println(F("[?] Print this menu"));
Serial.println(F("[a] read the ADC 2.8V max (FONA800 & 808)"));
Serial.println(F("[b] read the Battery V and % charged"));
Serial.println(F("[C] read the SIM CCID"));
Serial.println(F("[U] Unlock SIM with PIN code"));
Serial.println(F("[i] read RSSI"));
Serial.println(F("[n] get Network status"));
Serial.println(F("[v] set audio Volume"));
Serial.println(F("[V] get Volume"));
Serial.println(F("[H] set Headphone audio (FONA800 & 808)"));
Serial.println(F("[e] set External audio (FONA800 & 808)"));
Serial.println(F("[T] play audio Tone"));
Serial.println(F("[P] PWM/Buzzer out (FONA800 & 808)"));
// FM (SIM800 only!)
Serial.println(F("[f] tune FM radio (FONA800)"));
Serial.println(F("[F] turn off FM (FONA800)"));
Serial.println(F("[m] set FM volume (FONA800)"));
Serial.println(F("[M] get FM volume (FONA800)"));
Serial.println(F("[q] get FM station signal level (FONA800)"));
// Phone
Serial.println(F("[c] make phone Call"));
Serial.println(F("[A] get call status"));
Serial.println(F("[h] Hang up phone"));
Serial.println(F("[p] Pick up phone"));
// SMS
Serial.println(F("[N] Number of SMSs"));
Serial.println(F("[r] Read SMS #"));
Serial.println(F("[R] Read All SMS"));
Serial.println(F("[d] Delete SMS #"));
Serial.println(F("[s] Send SMS"));
Serial.println(F("[u] Send USSD"));
// Time
Serial.println(F("[y] Enable network time sync (FONA 800 & 808)"));
Serial.println(F("[Y] Enable NTP time sync (GPRS FONA 800 & 808)"));
Serial.println(F("[t] Get network time"));
// GPRS
Serial.println(F("[G] Enable GPRS"));
Serial.println(F("[g] Disable GPRS"));
Serial.println(F("[l] Query GSMLOC (GPRS)"));
Serial.println(F("[w] Read webpage (GPRS)"));
Serial.println(F("[W] Post to website (GPRS)"));
// GPS
if ((type == FONA3G_A) || (type == FONA3G_E) || (type == FONA808_V1) || (type == FONA808_V2)) {
Serial.println(F("[O] Turn GPS on (FONA 808 & 3G)"));
Serial.println(F("[o] Turn GPS off (FONA 808 & 3G)"));
Serial.println(F("[L] Query GPS location (FONA 808 & 3G)"));
if (type == FONA808_V1) {
Serial.println(F("[x] GPS fix status (FONA808 v1 only)"));
}
Serial.println(F("[E] Raw NMEA out (FONA808)"));
}
Serial.println(F("[S] create Serial passthru tunnel"));
Serial.println(F("-------------------------------------"));
Serial.println(F(""));
}
void loop() {
Does the code in reply #11 compile ?
The readline() function is in the Adafruit_FONA.cpp file which is associated with the Adafruit_FONA.h file
yes the complete code does compile. and it works perfect. this is just part of the code. the complete code cant fit on to the forum unless i post it at 3 sections.
the complete code cant fit on to the forum unless i post it at 3 sections.
You can attach it to a post
ok i have attached the complete fona test library and also the HX711 library. these are the two that im using.
HX711_full_example.ino (2.62 KB)
FONAtest_cpl.ino (25.5 KB)