Hi
I was looking at doing the Digital spirit level from the blog here:
The only problem is, that in the past 2 days, the link no longer works? I don't know much about the internet, so I don't know why!
My questions are..
I know it's a long shot, and knowing me very possibly in the wrong forum but thanks in advance.
I couldn't find a google-cache page (must say I'm no expert in searching cached pages as well) and it probably looks different as supposed to, but here's some info you may be looking for.
- Is the site likely to come back up?
It looks like the "rental" on that URL or on the server that it points to as run out.
do a google search for :-
digital-spirit-level-adxl345-tft-display-hy-1-8-spi-and-an-arduino
and use the arrow underneath the match to select the cached version. When I tried this there was not much success.
However the third link was to a printerst web site that showed me some photos before it asked me to log in or create an account, which I declined to do.
That looks right, I'm on my phone so I will have to try at home.
Thanks guys 
I put the link into the wayback machine.
got this
shame the poster did not keep current.
looks like he is talented.
Yeah, the guy seems really good, It's a real shame. I tried to contact him through YouTube and chrome links, so hopefully he might bring it back.
I didn't notice there was a donate page 
I Feel bad I didn't support it.
Thanks Again Folks.
I used a Sparkfun ring LED and an ADXL345 to make a bubble level a long time ago. This was a step towards developing a simple library which only exposed the one function I needed from the ADXL345. As a result, it does depend on one of my other programs to store some calibration data in the EEPROM. You could just hand-code the values into that function for testing.
Code attached. Let me know if there's any questions.
RingCoderBubble.ino (10 KB)
Well, I have managed to build the project, but...... when I connect the ADXL345
It stops working (Screen goes White).
The other problem is I can't seem to power the Nano off the board as well as the screen?
Using a 9v battery??
Screen? What screen? LCD screens use a lot of of power due to the necessary backlight.
Post your code. With code tags.
Hi
Well I have it working It seems the ebay seller lied about the ADXL being either 3.3v OR 5v! I had to change my wiring aswell for some reason, 1 being my breadboard was not powering correctly and I had to put the Ground of my ADXL345 to the Grnd on the NANO??? as opposed to supply Ground.
I would like to bring up a message first (Kind of a user guide/Disclaimer) Before the spirit level comes on, but since I got the code elsewhere I Don't know how to code That in!
I would also Like to find out how accurate this is set to measure Eg. is it set to 1Deg, a few degrees? It should be able to work out in the code I think?
Cheers
#include <Wire.h>
#include <ADXL345.h>
#define cs 10 // Arduino-Pin an Display CS
#define dc 9 // Arduino-Pin an Display A0
#define rst 8 // Arduino Reset-Pin
#include "Adafruit_GFX.h" // Adafruit Grafik-Bibliothek
#include "Adafruit_ST7735.h" // Adafruit ST7735-Bibliothek
#include <SPI.h>
Adafruit_ST7735 tft = Adafruit_ST7735(cs, dc, rst); // Display-Bibliothek Setup
ADXL345 accel;
#define button_correction 3
void setup(void){
Serial.begin(9600);
pinMode(button_correction, INPUT);
// Sensor
accel.begin(); // Sensor initialisieren
accel.setRange(accel.RANGE_16G); // Empfindlichkeit einstellen
// Display
tft.initR(INITR_BLACKTAB); // ST7735-Chip initialisieren
tft.setTextWrap(true);
display_show();
}
const float alpha = 0.5;
double fXg = 0;
double fYg = 0;
double fZg = 0;
double x_correction=0;
double y_correction=0;
int x_value=0;
int y_value=0;
int old_x_value=1;
int old_y_value=1;
#define filter_count_max 40
byte filter_count=0;
#define correction_precision 300 // Sollte Anzeige im Liegen wackeln Wert vermindern
void loop(void){
double pitch, roll, Xg, Yg, Zg;
accel.read(&Xg, &Yg, &Zg);
fXg+=Xg;
fYg+=Yg;
filter_count++;
if(filter_count==filter_count_max-1){
fXg/=filter_count_max;
fYg/=filter_count_max;
if(digitalRead(button_correction)==HIGH){
x_correction=fXg;
y_correction=fYg;
}
x_value=(fXg-x_correction)*correction_precision;
y_value=(fYg-y_correction)*correction_precision;
//display_info();
display_graphic();
old_x_value=x_value;
old_y_value=y_value;
fXg=0;
fYg=0;
filter_count=0;
}
delay(5);
}
#define hx 27
#define hy 16
#define hw 95
#define hh 18
#define hb 7
#define vx 5
#define vy 38
#define vw 18
#define vh 95
#define vb 7
#define cx 75
#define cy 86
#define cr 45
#define cb 5
void display_show(){
tft.fillScreen(ST7735_BLACK);
set_text(32,3,"Wasserwaage",ST7735_BLUE,1);
set_text(14,149,"blog.simtronyx.de",ST7735_GREEN,1);
tft.drawRect(hx-1,hy-1,hw+2,hh+2,rgb565(128,128,128));
tft.drawRect(hx+1,hy+1,hw-2,hh-2,rgb565(128,128,128));
tft.drawRect(hx,hy,hw,hh,ST7735_WHITE);
tft.drawRect(vx-1,vy-1,vw+2,vh+2,rgb565(128,128,128));
tft.drawRect(vx+1,vy+1,vw-2,vh-2,rgb565(128,128,128));
tft.drawRect(vx,vy,vw,vh,ST7735_WHITE);
tft.drawCircle(cx,cy,cr+1,rgb565(128,128,128));
tft.drawCircle(cx,cy,cr-1,rgb565(128,128,128));
tft.drawCircle(cx,cy,cr,ST7735_WHITE);
}
void display_graphic(){
if(x_value!=old_x_value){
tft.drawRect(hx+hw/2+constrain(old_x_value,-hw/2+(hb+1)/2,hw/2-(hb+1)/2)-(hb-1)/2,hy+2,hb,hh-4,rgb565(0,0,0));
tft.drawRect(hx+hw/2,hy+2,1,hh-4,rgb565(255,255,255));
tft.drawRect(hx+hw/2+constrain(x_value,-hw/2+(hb+1)/2,hw/2-(hb+1)/2)-(hb-1)/2,hy+2,hb,hh-4,rgb565(0+constrain(abs(x_value)*10,0,255),255-constrain(abs(x_value)*10,0,255),0));
}
if(y_value!=old_y_value){
tft.drawRect(vx+2,vy+vh/2-(constrain(old_y_value,-vh/2+(vb+1)/2,vh/2-(vb+1)/2)+(vb-1)/2),vw-4,vb,rgb565(0,0,0));
tft.drawRect(vx+2,vy+vh/2,vw-4,1,rgb565(255,255,255));
tft.drawRect(vx+2,vy+vh/2-(constrain(y_value,-vh/2+(vb+1)/2,vh/2-(vb+1)/2)+(vb-1)/2),vw-4,vb,rgb565(0+constrain(abs(y_value)*10,0,255),255-constrain(abs(y_value)*10,0,255),0));
}
if((x_value!=old_x_value)||(y_value!=old_y_value)){
float hxv=old_x_value;
float hyv=old_y_value;
float l=sqrt(hxv*hxv+hyv*hyv);
if(l>cr-cb-2){
hxv=hxv/l*(cr-cb-2);
hyv=hyv/l*(cr-cb-2);
}
tft.fillCircle(cx+hxv,cy-hyv,cb,rgb565(0,0,0));
tft.drawCircle(cx,cy,cb+2,rgb565(255,255,255));
hxv=x_value;
hyv=y_value;
l=sqrt(hxv*hxv+hyv*hyv);
if(l>cr-cb-2){
hxv=hxv/l*(cr-cb-2);
hyv=hyv/l*(cr-cb-2);
}
tft.fillCircle(cx+hxv,cy-hyv,cb,rgb565(0+constrain((((abs(x_value)+abs(y_value))/2)*10),0,255),255-constrain((((abs(x_value)+abs(y_value))/2)*10),0,255),0));
}
}
void display_info(){
if(x_value!=old_x_value){
set_text(4,16,value_to_string(old_x_value),ST7735_BLACK,1);
set_text(4,16,value_to_string(x_value),ST7735_WHITE,1);
}
if(y_value!=old_y_value){
set_text(4,26,value_to_string(old_y_value),ST7735_BLACK,1);
set_text(4,26,value_to_string(y_value),ST7735_WHITE,1);
}
}
void set_text(int x,int y,String text,int color,int size){
tft.setTextSize(size);
tft.setCursor(x,y);
tft.setTextColor(color);
tft.print(text);
}
// Hilfsfunktionen
uint16_t rgb565(uint8_t r, uint8_t g, uint8_t b){
return ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3);
}
String value_to_string(int value){
String value_string = String(value);
return value_string;
}
Hi,
To check calibration you will have to use an external device to set your angles.
Plum-bob and protractor?
Tom...
yeah unfortunately it seems that way. It does reset after power off to the same position, unfortunalty it's not the position I want!
Anyone got any idea about how to add some text before it starts?
Or how to reset the standard level point when I power off and on?