Hi everyone.
The sketch got a compiling error of: 'File' does not name a type
need help please.
Thanks
Adam
#include "SSD1306.h" // OLED
#include <LoRa.h> // LoRa
#include <mySD.h>
//#include <SPI.h>
//#include <Wire.h>
//#include "SSD1306Wire.h"
File root;
// OLED Pin
#define SDA 4 // Serial Data
#define SCL 15 // Serial Clock
#define oRST 16 // Reset
#define OLED_ADDR 0x3C // OLED display TWI address
SSD1306 display(OLED_ADDR, SDA, SCL);
// OLED screen text rows:
#define row1 0 // y=0 is top row of size 1 text
#define row2 10
#define row3 20
#define row4 30
#define row5 40
#define row6 50 // row7 at 70 is too low
// SPI port #2: SD Card Adapter
#define SD_CLK 17
#define SD_MISO 13
#define SD_MOSI 12
#define SD_CS 23
// SPI port: LoRa (SX1278)
// LoRa Pin
#define LoRa_SCK 5
#define LoRa_MISO 19
#define LoRa_MOSI 27
#define LoRa_CS 18
#define LoRa_RST 14 // LoRa_Reset
#define DI0 26 // LoRa_IRQ
#define BAND 915E6 // other freq: 433E6 // or ? LoRa f(MHz)
#define Select LOW // Low CS means that SPI device Selected
#define DeSelect HIGH // High CS means that SPI device Deselected
File sessionFile; // SD card filenames are restricted to 8 characters + extension
int counter = 0; // count sent LoRa messages
int count = 0;
String recv = "";
String temp = "";
/***********************************************************/
void setup(){
// set output pins
pinMode(oRST,OUTPUT);
pinMode(SD_CS,OUTPUT);
pinMode(LoRa_CS,OUTPUT);
digitalWrite(LoRa_CS, DeSelect);
// set GPIO16 Low then High to Reset OLED
digitalWrite(oRST, LOW);
delay(50);
digitalWrite(oRST, HIGH);
Serial.begin(115200);
while(!Serial); // wait to connect to computer
display.init();
display.flipScreenVertically();
display.setFont(ArialMT_Plain_10);
display.setTextAlignment(TEXT_ALIGN_LEFT);
display.clear();
display.display();
Serial.print("Initializing SD card...");
digitalWrite(SD_CS, Select); // SELECT (Low) SD Card SPI
/**/
if (!SD.begin( SD_CS, SD_MOSI, SD_MISO, SD_CLK )) {
Serial.println("initialization failed!");
// now what?
} else {
Serial.println("initialization done.");
display.drawString( 5,row1,"SD Card OK!" );
display.display();
delay(1000);
}
/* open "test.txt" for writing */
root = SD.open("test.txt", FILE_WRITE);
if (root) {
root.println("Hello world!");
root.flush();
root.close();
} else { // file open error
Serial.println("error opening test.txt");
}
display.drawString( 5,row2,"Wrote in test.txt" );
display.display();
delay(100);
/* after writing, then reopen the file and read it */
root = SD.open("test.txt");
if (root) { /* read from the file to the end of it */
while (root.available()) { // read the file
Serial.write(root.read());
}
root.close();
} else {
Serial.println("error opening test.txt");
}
display.drawString( 5,row3,"Read from test.txt" );
display.display();
delay(100);
// done testing the SD Card
digitalWrite(SD_CS, DeSelect);
// SD.end();
delay( 100 );
// now test the LoRa
SPI.begin( LoRa_SCK, LoRa_MISO, LoRa_MOSI, LoRa_CS );
LoRa.setPins( LoRa_CS, LoRa_RST, DI0 );
digitalWrite(LoRa_CS, Select); // SELECT (low) LoRa SPI
Serial.println("LoRa Sender");
if (!LoRa.begin(BAND)) {
Serial.println("Starting LoRa failed!");
display.drawString( 5, row4, "LoRa Init Failed!");
display.display();
// now what?
} else {
Serial.println("LoRa Initial OK!");
display.drawString( 5, row4, "LoRa Initialized OK!");
display.display();
delay(1000);
}
digitalWrite(LoRa_CS, DeSelect);
Serial.println("Setup done!");
}
void loop() {
digitalWrite(LoRa_CS, Select);
if (LoRa.parsePacket()) {
recv = "";
while (LoRa.available()) {
recv += (char)LoRa.read();
}
count++;
display.clear();
display.drawString(5, row4, recv);
String info = "[" + String(count) + "]" + "RSSI " + String(LoRa.packetRssi());
display.drawString(5, row2, info);
display.display();
}
if(temp != recv){
temp = recv;
digitalWrite(LoRa_CS, DeSelect);
delay(50);
digitalWrite(SD_CS, Select);
root = SD.open("test.txt", FILE_WRITE);
Serial.println(root);
if (root) {
root.println(temp);
root.flush();
root.close();
}
Serial.println(temp);
digitalWrite(SD_CS, DeSelect);
delay(50);
}
}
ERROR:
Arduino: 1.8.19 (Windows 7), Board: "TTGO LoRa32-OLED V1, 40MHz, 921600, None"
sketch_jan07b:8:1: error: 'File' does not name a type
File root;
^
sketch_jan07b:44:1: error: 'File' does not name a type
File sessionFile; // SD card filenames are restricted to 8 characters + extension
^
C:\Users\HUA.DELLV-PC\Documents\Arduino\sketch_jan07b\sketch_jan07b.ino: In function 'void setup()':
sketch_jan07b:86:3: error: 'root' was not declared in this scope
root = SD.open("test.txt", FILE_WRITE);
^
C:\Users\HUA.DELLV-PC\Documents\Arduino\sketch_jan07b\sketch_jan07b.ino: In function 'void loop()':
sketch_jan07b:155:5: error: 'root' was not declared in this scope
root = SD.open("test.txt", FILE_WRITE);
^
exit status 1
'File' does not name a type
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
