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spark_counter
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rpi is a C++ file actually

This commit is contained in:
King Kévin 2015-11-08 17:00:17 +01:00
parent 8b98987d1d
commit 938cfd04fc
2 changed files with 174 additions and 2 deletions
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4
rpi/Makefile
View File

@ -10,12 +10,12 @@ endif
# define all programs
PROGRAMS = spark_counter_receiver
SOURCES = ${PROGRAMS:=.c}
SOURCES = ${PROGRAMS:=.cpp}
all: ${PROGRAMS}
${PROGRAMS}: ${SOURCES}
gcc ${CCFLAGS} -Wall -I../ -lrf24-bcm -lcurl $@.c -o $@
g++ ${CCFLAGS} -Wall -I../ -lrf24-bcm -lcurl -o $@ $<
clean:
rm -rf $(PROGRAMS)

172
rpi/spark_counter_receiver.cpp Normal file
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@ -0,0 +1,172 @@
/* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* Copyright (c) 2015 King Kévin <kingkevin@cuvoodoo.info> */
/* the spark counter receives electricity measurements over radio
* they are then received using an nRF2L01+ transceiver
* to communicate with the transceiver the RF24 library is requiered
* they are then stored in an InfluxDB time series database using the HTTP API
* to send values to the database the curl library is required
*/
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <RF24/RF24.h> // http://tmrh20.github.io/RF24 library to communicate to the nRF24L01+
#include <curl/curl.h> // curl library to send the measurement data to the influxDB.
// Setup for RPi B1 GPIO 22 CE and CE0 CSN with SPI Speed @ 8Mhz
RF24 radio(RPI_V2_GPIO_P1_22, BCM2835_SPI_CS0, BCM2835_SPI_SPEED_8MHZ);
// nRF24L01+ addresses
const uint8_t tx_addr[] = {1,'h','o','m','e'};
const uint8_t rx_addr[] = {0,'h','o','m','e'};
CURL *curl; // curl handle to post data to influxbd using the HTTP API
int main(int argc, char** argv){
// configure influxdb connection
curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "http://localhost:8086/write?db=electricity");
}
// configure nRF24L01+ radio
radio.begin();
radio.setChannel(42);
radio.setPALevel(RF24_PA_MAX);
radio.setDataRate(RF24_1MBPS);
radio.setAutoAck(true);
radio.enableDynamicPayloads();
radio.setRetries(2,15);
radio.setCRCLength(RF24_CRC_8);
radio.openWritingPipe(tx_addr);
radio.openReadingPipe(1,rx_addr);
//radio.printDetails();
printf("wait for packet to arrive\n");
radio.startListening();
while (1) { // forever loop
while (radio.available()) {
time_t ltime; // calendar time
ltime=time(NULL); // get current cal time
char stime[64]; // do display the time
strftime(stime, sizeof(stime), "%F %T %z %Z", localtime(&ltime));
printf("%s: payload received\n",stime);
uint8_t payload[32]; // buffer to save the payload
uint8_t size = radio.getDynamicPayloadSize();
radio.read(&payload,size);
/*
printf("got %d bytes:",size);
for (uint8_t i=0; i<size; i++) {
printf(" %02x",payload[i]);
}
printf("\n");
*/
// got through payload
uint8_t id = 0; // the meter id (0 is myself, used for unknown source)
CURLcode res = CURLE_OK; // curl response
char post[128] = {0}; // string to submit data to DB using POST request
uint8_t i = 0; // index within the data
while (i+2<size) {
uint8_t type = payload[i]; // type of IE
uint8_t length = payload[i+1]; // length of IE
if (i+1+length<size) { // value is within data
switch (type) { // read type
case 0: // id
if (length==1) {
id = payload[i+2];
printf("meter: %d\n",id);
}
break;
case 1: // voltage
if (length==4) {
float value = 0;
memcpy(&value,&payload[i+2],length);
printf("voltage: %f V\n",value);
if (curl) {
snprintf(post, sizeof(post), "voltage,meter=%d value=%f", id, value);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post);
//res = curl_easy_perform(curl);
if(res!= CURLE_OK) {
fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
}
}
}
break;
case 2: // current
if (length==4) {
float value = 0;
memcpy(&value,&payload[i+2],length);
printf("current: %f A\n",value);
if (curl) {
snprintf(post, sizeof(post), "current,meter=%d value=%f", id, value);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post);
//res = curl_easy_perform(curl);
if(res!= CURLE_OK) {
fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
}
}
}
break;
case 3: // power
if (length==4) {
float value = 0;
memcpy(&value,&payload[i+2],length);
printf("power: %f W\n",value);
if (curl) {
snprintf(post, sizeof(post), "power,meter=%d value=%f", id, value);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post);
//res = curl_easy_perform(curl);
if(res!= CURLE_OK) {
fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
}
}
}
break;
case 4: // energy
if (length==4) {
float value = 0;
memcpy(&value,&payload[i+2],length);
printf("energy: %f Wh\n",value);
if (curl) {
snprintf(post, sizeof(post), "energy,meter=%d value=%f", id, value);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post);
//res = curl_easy_perform(curl);
if(res!= CURLE_OK) {
fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
}
}
}
break;
default:
printf("unknown type: %d\n",payload[i]);
}
i += 2+length; // got to next IE
} else { // value isn't within data
i = size; // end the loop
}
}
}
usleep(10000); // wait 10ms before request if data is available again (the IRQ signal is not used)
}
if (curl) {
curl_easy_cleanup(curl);
}
}