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