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#DonLucElectronics #DonLuc #RadioFrequency #Moteino #Send #Receive #GPSReceiver #OpenLog #Display #FreeIMU #Magnetometer #Accelerometer #Gyroscope #Arduino #Project #Fritzing #Programming #Electronics #Microcontrollers #Consultant
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GPS Receiver – GP-20U7 (56 Channel)
The GP-20U7 is a compact GPS receiver with a built-in high performances all-in-one GPS chipset. The GP-20U7 accurately provides position, velocity, and time readings as well possessing high sensitivity and tracking capabilities. Thanks to the low power consumption this receiver requires, the GP-20U7 is ideal for portable applications such as tablet PCs, smart phones, and other devices requiring positioning capability.
This 56-channel GPS module, that supports a standard NMEA-0183 and uBlox 7 protocol, has low power consumption of 40mA@3.3V (Max), an antenna on board, and -162dBm tracking sensitivity. With 56 channels in search mode and 22 channels “All-In-View” tracking, the GP-20U7 is quite the work horse for its size.
DL2212Mk02
2 x Moteino R2 (RFM12B)
1 x GPS Receiver – GP-20U7 (56 Channel)
1 x SparkFun OpenLog
1 x microSD Card – 16GB
1 x SparkFun Micro OLED Breakout (Qwiic)
1 x SparkFun 9 Degrees of Freedom – Sensor Stick
2 x Lithium Ion Battery – 1 Ah
1 x SparkFun Cerberus USB Cable
Moteino R2 (Receive)
TX0 – Digital 1
TR0 – Digital 2
LED – Digital 9
TR1 – Digital 10
TR2 – Digital 11
TR3 – Digital 12
TR4 – Digital 13
SDA – Analog A4
SCL – Analog A5
VIN – +3.3V
GND – GND
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DL2212Mk02pr.ino
/* ***** Don Luc Electronics © *****
Software Version Information
Project #26 - Radio Frequency - GPS Receiver - Mk07
26-07
Receive
DL2212Mk02pr.ino
2 x Moteino R2 (RFM12B)
1 x GPS Receiver - GP-20U7 (56 Channel)
1 x SparkFun OpenLog
1 x microSD Card - 16GB
1 x SparkFun Micro OLED Breakout (Qwiic)
1 x SparkFun 9 Degrees of Freedom - Sensor Stick
2 x Lithium Ion Battery - 1Ah
1 x SparkFun Cerberus USB Cable
*/
// Include the Library Code
// RFM12B Radio
#include <RFM12B.h>
// Two Wire Interface (TWI/I2C)
#include <Wire.h>
// SparkFun Micro OLED
#include <SFE_MicroOLED.h>
// You will need to initialize the radio by telling it what ID
// it has and what network it's on
// The NodeID takes values from 1-127, 0 is reserved for sending
// broadcast messages (send to all nodes)
// The Network ID takes values from 0-255
// By default the SPI-SS line used is D10 on Atmega328.
// You can change it by calling .SetCS(pin) where pin can be {8,9,10}
// Network ID used for this unit
#define NODEID 1
// The network ID we are on
#define NETWORKID 99
// Serial
#define SERIAL_BAUD 115200
// Encryption is OPTIONAL
// to enable encryption you will need to:
// - provide a 16-byte encryption KEY (same on all nodes that talk encrypted)
// - to call .Encrypt(KEY) to start encrypting
// - to stop encrypting call .Encrypt(NULL)
uint8_t KEY[] = "ABCDABCDABCDABCD";
// Need an instance of the RFM12B Radio Module
RFM12B radio;
// Process Message
// Message
String msg = "";
int firstClosingBracket = 0;
// Yaw Pitch Roll
String sYaw = "";
String sPitch = "";
String sRoll = "";
float Yaw = 0;
float Pitch = 0;
float Roll = 0;
// LED
int iLED = 9;
// SparkFun Micro OLED
#define PIN_RESET 9
#define DC_JUMPER 1
// I2C declaration
MicroOLED oled(PIN_RESET, DC_JUMPER);
// Software Version Information
String sver = "26-07";
void loop() {
// is RFM12B Radio
isRFM12BRadio();
// Micro OLED
isMicroOLED();
}
getFreeIMU.ino
// FreeIMU
// isFreeIMU
void isFreeIMU(){
// FreeIMU
// msg = "<IMU|Yaw|Pitch|Roll|GPS Status|Latitude|Longitude|Date|Time|*"
// msg = "<IMU|" + sYaw + "|" + sPitch + "|" + sRoll + "|" + GPSSt
// + "|" + TargetLat + "|" TargetLon + "|" + TargetDat +"|" + TargetTim + "|*"
firstClosingBracket = 0;
// "<IMU|"
firstClosingBracket = msg.indexOf('|');
msg.remove(0, 5);
// Yaw
firstClosingBracket = msg.indexOf('|');
sYaw = msg;
sYaw.remove(firstClosingBracket);
Yaw = sYaw.toFloat();
// Pitch
firstClosingBracket = firstClosingBracket + 1;
msg.remove(0, firstClosingBracket );
firstClosingBracket = msg.indexOf('|');
sPitch = msg;
sPitch.remove(firstClosingBracket);
Pitch = sPitch.toFloat();
// Roll
firstClosingBracket = firstClosingBracket + 1;
msg.remove(0, firstClosingBracket );
firstClosingBracket = msg.indexOf('|');
sRoll = msg;
sRoll.remove(firstClosingBracket);
Roll = sRoll.toFloat();
}
getMicroOLED.ino
// SparkFun Micro OLED
// Setup Micro OLED
void isSetupMicroOLED() {
// Initialize the OLED
oled.begin();
// Clear the display's internal memory
oled.clear(ALL);
// Display what's in the buffer (splashscreen)
oled.display();
// Delay 1000 ms
delay(1000);
// Clear the buffer.
oled.clear(PAGE);
}
// Micro OLED
void isMicroOLED() {
// Text Display FreeIMU
// Clear the display
oled.clear(PAGE);
// Set cursor to top-left
oled.setCursor(0, 0);
// Set font to type 0
oled.setFontType(0);
// FreeIMU
oled.print("FreeIMU");
oled.setCursor(0, 12);
// Yaw
oled.print("Y: ");
oled.print(Yaw);
oled.setCursor(0, 25);
// Pitch
oled.print("P: ");
oled.print(Pitch);
oled.setCursor(0, 39);
// Roll
oled.print("R: ");
oled.print(Roll);
oled.display();
}
getRFM12BRadio.ino
// RFM12B Radio
void isSetupRFM12BRadio()
{
// RFM12B Radio
radio.Initialize(NODEID, RF12_433MHZ, NETWORKID);
// Encryption
radio.Encrypt(KEY);
// Transmitting
}
// is RFM12 BRadio
void isRFM12BRadio()
{
// Receive
if (radio.ReceiveComplete())
{
// CRC Pass
if (radio.CRCPass())
{
// Message
msg = "";
// Can also use radio.GetDataLen() if you don't like pointers
for (byte i = 0; i < *radio.DataLen; i++)
{
//Serial.print((char)radio.Data[i]);
msg = msg + (char)radio.Data[i];
}
// Serial
Serial.println( msg );
// Turn the LED on HIGH
digitalWrite( iLED , HIGH);
// FreeIMU
// Yaw Pitch Roll
isFreeIMU();
// ACK Requested
if (radio.ACKRequested())
{
// Send ACK
radio.SendACK();
}
// Turn the LED on LOW
digitalWrite( iLED , LOW);
}
else
{
// BAD-CRC
}
}
}
setup.ino
// Setup
void setup()
{
// Serial
Serial.begin(SERIAL_BAUD);
// Give display time to power on
delay(100);
// Set up I2C bus
Wire.begin();
// Setup Micro OLED
isSetupMicroOLED();
// LED
pinMode( iLED , OUTPUT);
// RFM12B Radio
isSetupRFM12BRadio();
}
——
Moteino R2 (Send)
TR0 – Digital 2
GPT – Digital 3
GPR – Digital 4
LED – Digital 9
TR1 – Digital 10
TR2 – Digital 11
TR3 – Digital 12
TR4 – Digital 13
SDA – Analog A4
SCL – Analog A5
VIN – +3.3V
GND – GND
——
DL2212Mk02ps.ino
/* ***** Don Luc Electronics © *****
Software Version Information
Project #26 - Radio Frequency - GPS Receiver - Mk07
26-07
Send
DL2212Mk02ps.ino
2 x Moteino R2 (RFM12B)
1 x GPS Receiver - GP-20U7 (56 Channel)
1 x SparkFun OpenLog
1 x microSD Card - 16GB
1 x SparkFun Micro OLED Breakout (Qwiic)
1 x SparkFun 9 Degrees of Freedom - Sensor Stick
2 x Lithium Ion Battery - 1Ah
1 x SparkFun Cerberus USB Cable
*/
// Include the Library Code
// RFM12B Radio
#include <RFM12B.h>
// Sleep
#include <avr/sleep.h>
// Two Wire Interface (TWI/I2C)
#include <Wire.h>
// Includes and variables for IMU integration
// Accelerometer
#include <ADXL345.h>
// Magnetometer
#include <HMC58X3.h>
// MEMS Gyroscope
#include <ITG3200.h>
// Debug
#include "DebugUtils.h"
// FreeIMU
#include <CommunicationUtils.h>
#include <FreeIMU.h>
// GPS Receiver
#include <TinyGPS++.h>
// Software Serial
#include <SoftwareSerial.h>
// You will need to initialize the radio by telling it what ID
// it has and what network it's on
// The NodeID takes values from 1-127, 0 is reserved for sending
// broadcast messages (send to all nodes)
// The Network ID takes values from 0-255
// By default the SPI-SS line used is D10 on Atmega328.
// You can change it by calling .SetCS(pin) where pin can be {8,9,10}
// Network ID used for this unit
#define NODEID 2
// The network ID we are on
#define NETWORKID 99
// The node ID we're sending to
#define GATEWAYID 1
// # of ms to wait for an ack
#define ACK_TIME 50
// Serial
#define SERIAL_BAUD 115200
// Encryption is OPTIONAL
// to enable encryption you will need to:
// - provide a 16-byte encryption KEY (same on all nodes that talk encrypted)
// - to call .Encrypt(KEY) to start encrypting
// - to stop encrypting call .Encrypt(NULL)
uint8_t KEY[] = "ABCDABCDABCDABCD";
// Wait this many ms between sending packets
int interPacketDelay = 1000;
// Input
char input = 0;
// Need an instance of the RFM12B Radio Module
RFM12B radio;
// Send Size
byte sendSize = 0;
// Payload
char payload[100];
// Request ACK
bool requestACK = false;
// LED
int iLED = 9;
// Set the FreeIMU object
FreeIMU my3IMU = FreeIMU();
// Yaw Pitch Roll
String zzzzzz = "";
String sYaw = "";
String sPitch = "";
String sRoll = "";
float ypr[3];
float Yaw = 0;
float Pitch = 0;
float Roll = 0;
// GPS Receiver
#define gpsRXPIN 4
// This one is unused and doesnt have a conection
#define gpsTXPIN 3
// The TinyGPS++ object
TinyGPSPlus gps;
// Latitude
float TargetLat;
String sLat = "";
// Longitude
float TargetLon;
String sLon = "";
// GPS Date, Time
// GPS Date
String TargetDat;
// GPS Time
String TargetTim;
// GPS Status
String GPSSt = "";
// The serial connection to the GPS device
SoftwareSerial tGPS(gpsRXPIN, gpsTXPIN);
// Software Version Information
String sver = "26-07";
void loop()
{
// isGPS
isGPS();
// isFreeIMU
isFreeIMU();
// is RFM12B Radio
isRFM12BRadio();
// Inter Packet Delay
delay(interPacketDelay);
}
getFreeIMU.ino
// FreeIMU
// isFreeIMU
void isFreeIMU(){
// FreeIMU
// Yaw Pitch Roll
my3IMU.getYawPitchRoll(ypr);
// Yaw
Yaw = ypr[0];
// Pitch
Pitch = ypr[1];
// Roll
Roll = ypr[2];
}
getGPS.ino
// GPS Receiver
// Setup GPS
void setupGPS() {
// Setup GPS
tGPS.begin( 9600 );
}
// isGPS
void isGPS(){
// Receives NEMA data from GPS receiver
// This sketch displays information every time a new sentence is correctly encoded
while ( tGPS.available() > 0)
if (gps.encode( tGPS.read() ))
{
// GPS Vector Pointer Target
displayInfo();
// GPS Date, Time
displayDTS();
}
if (millis() > 5000 && gps.charsProcessed() < 10)
{
while(true);
}
}
// GPS Vector Pointer Target
void displayInfo(){
// Location
if (gps.location.isValid())
{
// Latitude
TargetLat = gps.location.lat();
// Longitude
TargetLon = gps.location.lng();
// GPS Status 2
GPSSt = "Yes";
}
else
{
// GPS Status 0
GPSSt = "No";
}
}
// GPS Date, Time
void displayDTS(){
// Date
TargetDat = "";
if (gps.date.isValid())
{
// Date
// Year
TargetDat += String(gps.date.year(), DEC);
TargetDat += "/";
// Month
TargetDat += String(gps.date.month(), DEC);
TargetDat += "/";
// Day
TargetDat += String(gps.date.day(), DEC);
}
// Time
TargetTim = "";
if (gps.time.isValid())
{
// Time
// Hour
TargetTim += String(gps.time.hour(), DEC);
TargetTim += ":";
// Minute
TargetTim += String(gps.time.minute(), DEC);
TargetTim += ":";
// Secound
TargetTim += String(gps.time.second(), DEC);
}
}
getRFM12BRadio.ino
// RFM12B Radio
void isSetupRFM12BRadio(){
// RFM12B Radio
radio.Initialize(NODEID, RF12_433MHZ, NETWORKID);
// Encryption
radio.Encrypt(KEY);
// Sleep right away to save power
radio.Sleep();
// Transmitting
Serial.println("Transmitting...\n\n");
}
// is RFM12 BRadio
void isRFM12BRadio(){
// sYaw, sPitch, sRoll ""
sYaw = "";
sPitch = "";
sRoll = "";
// Latitude and Longitude
sLat = "";
sLon = "";
// sYaw, sPitch, sRoll concat
sYaw.concat(Yaw);
sPitch.concat(Pitch);
sRoll.concat(Roll);
// Latitude and Longitude
sLat.concat( TargetLat );
sLon.concat( TargetLon );
// zzzzzz ""
zzzzzz = "";
// zzzzzz = "<IMU|Yaw|Pitch|Roll|GPS Status|Latitude|Longitude|Date|Time|*"
// zzzzzz = "<IMU|" + sYaw + "|" + sPitch + "|" + sRoll + "|" + GPSSt
// + "|" + TargetLat + "|" TargetLon + "|" + TargetDat +"|" + TargetTim + "|*"
zzzzzz = "<IMU|" + sYaw + "|" + sPitch + "|" + sRoll + "|" + GPSSt + "|"
+ sLat + "|" + sLon + "|" + TargetDat + "|" + TargetTim + "|*";
// sendSize Length
sendSize = zzzzzz.length();
// sendSize
payload[sendSize];
// sendSize, charAt
for(byte i = 0; i < sendSize+1; i++){
payload[i] = zzzzzz.charAt(i);
}
// payload
Serial.print(payload);
// Request ACK
requestACK = sendSize;
// Wakeup
radio.Wakeup();
// Turn the LED on HIGH
digitalWrite( iLED , HIGH);
// Send
radio.Send(GATEWAYID, payload, sendSize, requestACK);
// Request ACK
if (requestACK)
{
Serial.print(" - waiting for ACK...");
if (waitForAck()){
Serial.print("Ok!");
}
else Serial.print("nothing...");
}
// Turn the LED on LOW
digitalWrite( iLED , LOW);
// Sleep
radio.Sleep();
// Serial
Serial.println();
}
// Wait a few milliseconds for proper ACK, return true if received
static bool waitForAck(){
// Now
long now = millis();
// ACK
while (millis() - now <= ACK_TIME){
if (radio.ACKReceived(GATEWAYID)){
return true;
}
}
return false;
}
setup.ino
// Setup
void setup(){
// Serial
Serial.begin(SERIAL_BAUD);
// GPS Receiver
// Setup GPS
setupGPS();
// LED
pinMode( iLED , OUTPUT);
// Set up I2C bus
Wire.begin();
// RFM12B Radio
isSetupRFM12BRadio();
// Pause
delay(5);
// Initialize IMU
my3IMU.init();
// Pause
delay(5);
}
——
People can contact us: https://www.donluc.com/?page_id=1927
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