SmartRC-CC1101-Driver-Lib
SmartRC-CC1101-Driver-Lib copied to clipboard
LSatan
Frequency_scanner
Hello,
thank you for your work. Can you release new version of Frequency scanner working with new version of library? I used this utility to find exact transmiting frequency of my remotes and sensors. Than I finetuned receiving frequency of CC1101 together with narrow bandwidth for better range. Thank you
Hi, Thank you for your interest. I have rebuilt and improved the frequency scanner. He is now less prone to errors and works a little faster.
#include <ELECHOUSE_CC1101_SRC_DRV.h>
float start_freq = 433;
float stop_freq = 434;
float freq = start_freq;
long compare_freq;
float mark_freq;
int rssi;
int mark_rssi=-100;
void setup() {
Serial.begin(115200);
ELECHOUSE_cc1101.Init();
ELECHOUSE_cc1101.setRxBW(58);
ELECHOUSE_cc1101.SetRx();
Serial.println("Frequency Scanner Ready");
}
void loop() {
ELECHOUSE_cc1101.setMHZ(freq);
rssi = ELECHOUSE_cc1101.getRssi();
if (rssi>-75){
if (rssi > mark_rssi){
mark_rssi = rssi;
mark_freq = freq;
}
}
freq+=0.01;
if (freq>stop_freq){
freq=start_freq;
if (mark_rssi>-75){
long fr = mark_freq*100;
if (fr == compare_freq){
Serial.print("Freq: ");
Serial.println(mark_freq);
Serial.print("Rssi: ");
Serial.println(mark_rssi);
mark_rssi=-100;
compare_freq = 0;
mark_freq = 0;
}else{
compare_freq = mark_freq*100;
freq = mark_freq -0.10;
mark_freq=0;
mark_rssi=-100;
}
}
}
}
Regards
Hello,
thank you for your work. Can you release new version of Frequency scanner working with new version of library? I used this utility to find exact transmiting frequency of my remotes and sensors. Than I finetuned receiving frequency of CC1101 together with narrow bandwidth for better range. Thank you
Hello, how are you doing? I have been searching for frequency hopping, but the problem of frequency doubling is very serious. We can't distinguish between those [433.92 and 868 < 410 and 820 >...]. Do you have any solutions?
` float SearchFrequency(float mhz,float freqSpace,boolean isDetails); float searchFrequencyForRange(float startMhz,float endMhz,float freqSpace,boolean isDetails); void setup() { delay(3000); Serial.begin(115200); ELECHOUSE_cc1101.Init(); ELECHOUSE_cc1101.setRxBW(58); ELECHOUSE_cc1101.SetRx(); // Serial.println("Frequency Scanner Ready"); Serial.println("Frequency Scanner Ready"); }
float searchFrequency(float mhz,float freqSpace,boolean isDetails){ float start_freq = mhz; float stop_freq = mhz + 1; float freq = mhz; long compare_freq; float mark_freq; int rssi; int mark_rssi=-100; int searchTime = 0; ELECHOUSE_cc1101.Init(); ELECHOUSE_cc1101.setMHZ(mhz); ELECHOUSE_cc1101.setRxBW(58.03); ELECHOUSE_cc1101.SetRx(); delay(20); while (1) { searchTime ++; ELECHOUSE_cc1101.setMHZ(freq); rssi = ELECHOUSE_cc1101.getRssi();
if (rssi>-75){
if (rssi > mark_rssi){
mark_rssi = rssi;
mark_freq = freq;
}
}
freq+=freqSpace;
if (freq>stop_freq){
// Serial.print("freq>stop_freq");
freq=start_freq;
if (mark_rssi>-75){
long fr = mark_freq*100;
if (fr == compare_freq){
Serial.print("freq:");
Serial.println(freq);
Serial.print("rssi:");
Serial.println(rssi);
Serial.print("mark_freq: ");
Serial.println(mark_freq);
Serial.print("searchTime: ");
Serial.println(searchTime);
float saveMarkFreq = mark_freq;
mark_rssi=-100;
compare_freq = 0;
mark_freq = 0;
if (isDetails)
{
return saveMarkFreq;
}else
{
float startSaveMarkFreq = (int)saveMarkFreq-3;
float endSaveMarkFreq = (int)saveMarkFreq+3;
float getDetailsRequency = searchFrequencyForRange(startSaveMarkFreq,endSaveMarkFreq,0.01,true);
return getDetailsRequency;
}
}else{
compare_freq = mark_freq*100;
freq = mark_freq -0.10;
mark_freq=0;
mark_rssi=-100;
}
}else{
return -1;
}
}
}
} float searchFrequencyForRange(float startMhz,float endMhz,float freqSpace,boolean isDetails ){ while (1) { float frequency = searchFrequency(startMhz,freqSpace,isDetails);
if (frequency != -1)
{
return frequency;
}
startMhz ++;
if (startMhz >endMhz)
{
return -1;
}
}
} void loop() { float loopFrequency; loopFrequency = searchFrequencyForRange(300,347,0.1,true); Serial.print("loopFrequency:315 "); Serial.println(loopFrequency); loopFrequency = searchFrequencyForRange(388,463,0.1,true); Serial.print("loopFrequency:433 "); Serial.println(loopFrequency); loopFrequency = searchFrequencyForRange(779,927,0.1,true); Serial.print("loopFrequency:868 "); Serial.println(loopFrequency); }
`
Hello, boss, I am now encountering <433.92 and 867.8>, <390 and 780> the problem of doubling the frequency. Is there any trick to crack it?
Sure... the highest rssi is worth your frequency. You can exclude the wrong frequencies with rssi threshold.
check rssi_threshold = -35; you recive nothing? than test -40; you receive to much? than test -30; and so on. if it still does not bring the desired success. Please notify you again.
#include <ELECHOUSE_CC1101_SRC_DRV.h>
float start_freq = 433; //start scan frequency set.
float stop_freq = 434; //stop scan frequency set.
int rssi_threshold = -75; // set the threshold to react. the value should be between -20 and -90. recommended -75.
float freq = start_freq;
long compare_freq;
float mark_freq;
int rssi;
int mark_rssi=-100;
void setup() {
Serial.begin(115200);
ELECHOUSE_cc1101.Init();
ELECHOUSE_cc1101.setRxBW(58);
ELECHOUSE_cc1101.SetRx();
Serial.println("Frequency Scanner Ready");
}
void loop() {
ELECHOUSE_cc1101.setMHZ(freq);
rssi = ELECHOUSE_cc1101.getRssi();
if (rssi>rssi_threshold){
if (rssi > mark_rssi){
mark_rssi = rssi;
mark_freq = freq;
}
}
freq+=0.01;
if (freq>stop_freq){
freq=start_freq;
if (mark_rssi>rssi_threshold){
long fr = mark_freq*100;
if (fr == compare_freq){
Serial.print("Freq: ");
Serial.println(mark_freq);
Serial.print("Rssi: ");
Serial.println(mark_rssi);
mark_rssi=-100;
compare_freq = 0;
mark_freq = 0;
}else{
compare_freq = mark_freq*100;
freq = mark_freq -0.10;
mark_freq=0;
mark_rssi=-100;
}
}
}
}
Sure... the highest rssi is worth your frequency. You can exclude the wrong frequencies with rssi threshold.
check rssi_threshold = -35; you recive nothing? than test -40; you receive to much? than test -30; and so on. if it still does not bring the desired success. Please notify you again.
#include <ELECHOUSE_CC1101_SRC_DRV.h> float start_freq = 433; //start scan frequency set. float stop_freq = 434; //stop scan frequency set. int rssi_threshold = -75; // set the threshold to react. the value should be between -20 and -90. recommended -75. float freq = start_freq; long compare_freq; float mark_freq; int rssi; int mark_rssi=-100; void setup() { Serial.begin(115200); ELECHOUSE_cc1101.Init(); ELECHOUSE_cc1101.setRxBW(58); ELECHOUSE_cc1101.SetRx(); Serial.println("Frequency Scanner Ready"); } void loop() { ELECHOUSE_cc1101.setMHZ(freq); rssi = ELECHOUSE_cc1101.getRssi(); if (rssi>rssi_threshold){ if (rssi > mark_rssi){ mark_rssi = rssi; mark_freq = freq; } } freq+=0.01; if (freq>stop_freq){ freq=start_freq; if (mark_rssi>rssi_threshold){ long fr = mark_freq*100; if (fr == compare_freq){ Serial.print("Freq: "); Serial.println(mark_freq); Serial.print("Rssi: "); Serial.println(mark_rssi); mark_rssi=-100; compare_freq = 0; mark_freq = 0; }else{ compare_freq = mark_freq*100; freq = mark_freq -0.10; mark_freq=0; mark_rssi=-100; } } } }
Hi !! Thank you for your content, I would like you to help me, in this code it does not work at frequencies lower than 315mhz for example, would you know why?? float start_freq = 314; stop_freq = 315;
float SearchFrequency(float mhz,float freqSpace,boolean isDetails); float searchFrequencyForRange(float startMhz,float endMhz,float freqSpace,boolean isDetails); void setup() { delay(3000); Serial.begin(115200); ELECHOUSE_cc1101.Init(); ELECHOUSE_cc1101.setRxBW(58); ELECHOUSE_cc1101.SetRx(); // Serial.println("Frequency Scanner Ready"); Serial.println("Frequency Scanner Ready"); }
float searchFrequency(float mhz,float freqSpace,boolean isDetails){ float start_freq = mhz; float stop_freq = mhz + 1; float freq = mhz; long compare_freq; float mark_freq; int rssi; int mark_rssi=-100; int searchTime = 0; ELECHOUSE_cc1101.Init(); ELECHOUSE_cc1101.setMHZ(mhz); ELECHOUSE_cc1101.setRxBW(58.03); ELECHOUSE_cc1101.SetRx(); delay(20); while (1) { searchTime ++; ELECHOUSE_cc1101.setMHZ(freq); rssi = ELECHOUSE_cc1101.getRssi();
if (rssi>-75){ if (rssi > mark_rssi){ mark_rssi = rssi; mark_freq = freq; } } freq+=freqSpace; if (freq>stop_freq){ // Serial.print("freq>stop_freq"); freq=start_freq; if (mark_rssi>-75){ long fr = mark_freq*100; if (fr == compare_freq){ Serial.print("freq:"); Serial.println(freq); Serial.print("rssi:"); Serial.println(rssi); Serial.print("mark_freq: "); Serial.println(mark_freq); Serial.print("searchTime: "); Serial.println(searchTime); float saveMarkFreq = mark_freq; mark_rssi=-100; compare_freq = 0; mark_freq = 0; if (isDetails) { return saveMarkFreq; }else { float startSaveMarkFreq = (int)saveMarkFreq-3; float endSaveMarkFreq = (int)saveMarkFreq+3; float getDetailsRequency = searchFrequencyForRange(startSaveMarkFreq,endSaveMarkFreq,0.01,true); return getDetailsRequency; } }else{ compare_freq = mark_freq*100; freq = mark_freq -0.10; mark_freq=0; mark_rssi=-100; } }else{ return -1; } } }} float searchFrequencyForRange(float startMhz,float endMhz,float freqSpace,boolean isDetails ){ while (1) { float frequency = searchFrequency(startMhz,freqSpace,isDetails);
if (frequency != -1) { return frequency; } startMhz ++; if (startMhz >endMhz) { return -1; } }} void loop() { float loopFrequency; loopFrequency = searchFrequencyForRange(300,347,0.1,true); Serial.print("loopFrequency:315 "); Serial.println(loopFrequency); loopFrequency = searchFrequencyForRange(388,463,0.1,true); Serial.print("loopFrequency:433 "); Serial.println(loopFrequency); loopFrequency = searchFrequencyForRange(779,927,0.1,true); Serial.print("loopFrequency:868 "); Serial.println(loopFrequency); }
Hello buddy, how are you ? did you manage to get this code right? would you sell it? i really need it!!!