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s10m.c
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s10m.c
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#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <mosquitto.h>
#include <modbus.h>
#include "s10m.h"
static struct mosquitto *mosq = NULL;
char root_topic[128];
int mqtt_qos = 0;
int mqtt_retain = 0;
int verbose = 0;
static void publish(char *topic, char *payload) {
char tbuf[TOPIC_SIZE];
sprintf(tbuf, "%s/%s", root_topic, topic);
if (mosq && mosquitto_publish(mosq, NULL, tbuf, strlen(payload), payload, mqtt_qos, mqtt_retain)) {
printf("MQTT connection lost\n");
fflush(NULL);
mosquitto_disconnect(mosq);
mosquitto_destroy(mosq);
mosq = NULL;
}
if (verbose) printf("MQTT: publish topic >%s< payload >%s<\n", tbuf, payload);
}
static void publish_number_if_changed(int16_t *reg, int16_t *old, int format, int r, char *topic) {
char sbuf[BUFFER_SIZE];
if (old[r] != reg[r]) {
old[r] = reg[r];
switch (format) {
case F1: {
sprintf(sbuf, "%d", reg[r]);
break;
}
case F01: {
sprintf(sbuf, "%.1f", 0.1 * reg[r]);
break;
}
case F001: {
sprintf(sbuf, "%.2f", 0.01 * reg[r]);
break;
}
}
publish(topic, sbuf);
}
}
static void publish_string_if_changed(int16_t *reg, char *lst_value, int r, int length, char *topic) {
char sbuf[BUFFER_SIZE];
int j, i = 0;
for (j = r; j < length + r; j++) {
sbuf[i++] = MODBUS_GET_HIGH_BYTE(reg[j]);
sbuf[i++] = MODBUS_GET_LOW_BYTE(reg[j]);
}
if (strcmp(sbuf, lst_value)) {
publish(topic, sbuf);
strcpy(lst_value, sbuf);
}
}
static void publish_boolean(int16_t *reg, int r, int bit, int b, char *topic) {
char sbuf[BUFFER_SIZE];
sprintf(sbuf, "%s", ((reg[r] & b) >> bit)?"true":"false");
publish(topic, sbuf);
}
int main(int argc, char **argv) {
modbus_t *ctx = NULL;
int rc, bg, i, j;
char tbuf[TOPIC_SIZE];
char sbuf[BUFFER_SIZE];
char manufacturer[BUFFER_SIZE];
char model[BUFFER_SIZE];
char serial_number[BUFFER_SIZE];
char firmware[BUFFER_SIZE];
char bstate[BUFFER_SIZE];
char gstate[BUFFER_SIZE];
char key[128], value[128], line[256];
int reg_nr[2], reg_delta[2], reg_offset[2], wallbox;
char mqtt_host[128];
char mqtt_user[128];
char mqtt_password[128];
char modbus_host[128];
char modbus_port[128];
int mqtt_port = 1883;
int mqtt_auth = 0;
int interval = 1;
int force = 0;
int pool_length = sizeof(pool) / sizeof(pool[0]);
int16_t *regs = malloc((MODBUS_1_NR + MODBUS_2_NR) * sizeof(int16_t));
int16_t *olds = malloc((MODBUS_1_NR + MODBUS_2_NR) * sizeof(int16_t));
for (j = 0; j < (MODBUS_1_NR + MODBUS_2_NR); j++) olds[j] = 2 ^ 15 - 1;
reg_nr[0] = MODBUS_1_NR;
reg_delta[0] = 1;
reg_offset[0] = MODBUS_1_OFFSET;
reg_nr[1] = MODBUS_2_NR;
reg_delta[1] = MODBUS_1_NR;
reg_offset[1] = MODBUS_2_OFFSET;
strcpy(modbus_host, "e3dc");
strcpy(modbus_port, "502");
strcpy(mqtt_host, "localhost");
strcpy(root_topic, "s10");
strcpy(mqtt_user, "");
strcpy(mqtt_password, "");
strcpy(manufacturer, "");
strcpy(model, "");
strcpy(serial_number, "");
strcpy(firmware, "");
strcpy(bstate, "");
strcpy(gstate, "");
j = bg = 0;
while (j < argc) {
if (!strcmp(argv[j], "-d")) bg = 1;
j++;
}
FILE *fp;
fp = fopen(CONFIG_FILE, "r");
if (!fp)
printf("Config file %s not found. Using default values.\n", CONFIG_FILE);
else {
while (fgets(line, sizeof(line), fp)) {
memset(key, 0, sizeof(key));
memset(value, 0, sizeof(value));
if (sscanf(line, "%127[^ \t=]=%127[^\n]", key, value) == 2) {
if (!strcasecmp(key, "MODBUS_HOST"))
strcpy(modbus_host, value);
else if (!strcasecmp(key, "MODBUS_PORT"))
strcpy(modbus_port, value);
else if (!strcasecmp(key, "MQTT_HOST"))
strcpy(mqtt_host, value);
else if (!strcasecmp(key, "MQTT_PORT"))
mqtt_port = atoi(value);
else if (!strcasecmp(key, "MQTT_USER"))
strcpy(mqtt_user, value);
else if (!strcasecmp(key, "MQTT_PASSWORD"))
strcpy(mqtt_password, value);
else if (!strcasecmp(key, "MQTT_AUTH") && !strcasecmp(value, "true"))
mqtt_auth = 1;
else if (!strcasecmp(key, "MQTT_RETAIN") && !strcasecmp(value, "true"))
mqtt_retain = 1;
else if (!strcasecmp(key, "MQTT_QOS"))
mqtt_qos = abs(atoi(value));
if (mqtt_qos > 2) mqtt_qos = 0;
else if (!strcasecmp(key, "INTERVAL"))
interval = abs(atoi(value));
else if (!strcasecmp(key, "ROOT_TOPIC"))
strncpy(root_topic, value, 24);
else if (!strcasecmp(key, "FORCE") && !strcasecmp(value, "true"))
force = 1;
}
}
fclose(fp);
}
printf("Connecting...\n");
printf("E3DC system %s:%s (Modbus)\n", modbus_host, modbus_port);
printf("MQTT broker %s:%i qos = %i retain = %s\n", mqtt_host, mqtt_port, mqtt_qos, mqtt_retain?"true":"false");
printf("Fetching data every ");
if (interval == 1) printf("second.\n"); else printf("%i seconds.\n", interval);
printf("Force mode = %s\n", force?"true":"false");
if (isatty(STDOUT_FILENO)) {
printf("Stdout to terminal\n");
verbose = 1;
} else {
printf("Stdout to pipe/file\n");
bg = 0;
}
printf("\n");
fflush(NULL);
if (bg) {
printf("...working as a daemon.\n");
pid_t pid, sid;
pid = fork();
if (pid < 0)
exit(EXIT_FAILURE);
if (pid > 0)
exit(EXIT_SUCCESS);
umask(0);
sid = setsid();
if (sid < 0)
exit(EXIT_FAILURE);
if ((chdir("/")) < 0)
exit(EXIT_FAILURE);
close(STDIN_FILENO);
close(STDOUT_FILENO);
close(STDERR_FILENO);
}
mosquitto_lib_init();
while (1) {
// MQTT connection
if (!mosq) {
mosq = mosquitto_new(NULL, true, NULL);
printf("Connecting to MQTT broker %s:%i\n", mqtt_host, mqtt_port);
fflush(NULL);
if (mosq) {
if (mqtt_auth && strcmp(mqtt_user, "") && strcmp(mqtt_password, "")) mosquitto_username_pw_set(mosq, mqtt_user, mqtt_password);
if (!mosquitto_connect(mosq, mqtt_host, mqtt_port, 10)) {
printf("MQTT: Connected successfully\n");
fflush(NULL);
} else {
printf("MQTT: Connection failed\n");
fflush(NULL);
mosquitto_destroy(mosq);
mosq = NULL;
sleep(1);
continue;
}
}
}
// modbus connection
if (ctx == NULL) {
ctx = modbus_new_tcp_pi(modbus_host, modbus_port);
if (!ctx) {
printf("E3DC_MODBUS: Unable to allocate libmodbus context\n");
fflush(NULL);
sleep(1);
continue;
}
if (modbus_connect(ctx) == -1) {
printf("E3DC_MODBUS: Connection failed: %s\n", modbus_strerror(errno));
fflush(NULL);
if (ctx) modbus_free(ctx);
ctx = NULL;
sleep(1);
continue;
}
modbus_set_debug(ctx, FALSE);
modbus_set_response_timeout(ctx, 1, 0); // 1 second timeout
modbus_set_error_recovery(ctx, MODBUS_ERROR_RECOVERY_LINK | MODBUS_ERROR_RECOVERY_PROTOCOL);
printf("E3DC_MODBUS: Connected successfully\n");
fflush(NULL);
}
if (force) for (j = 0; j < (MODBUS_1_NR + MODBUS_2_NR); j++) olds[j] = 2 ^ 15 - 1;
for (i = 0; i < 2; i++) {
rc = modbus_read_registers(ctx, reg_offset[i], reg_nr[i], ®s[reg_delta[i]]);
if (rc != reg_nr[i]) {
printf("E3DC_MODBUS: ERROR modbus_read_registers at %d (%d/%d)\n", reg_delta[i], rc, reg_nr[i]);
fflush(NULL);
if (ctx) modbus_close(ctx);
if (ctx) modbus_free(ctx);
ctx = NULL;
sleep(1);
continue;
}
}
if (regs[1] != -7204) {
printf("E3DC_MODBUS: Modbus mode is wrong (%x). Must be E3DC, not SUN_SPEC.\n", regs[1]);
fflush(NULL);
sleep(interval);
continue;
}
if (olds[82] != regs[82]) {
sprintf(sbuf, "%d", MODBUS_GET_HIGH_BYTE(regs[82]) + 1);
publish("autarky", sbuf);
sprintf(sbuf, "%d", MODBUS_GET_LOW_BYTE(regs[82]) + 1);
publish("consumption", sbuf);
olds[82] = regs[82];
}
if (olds[85] != regs[85]) {
publish_boolean(regs, 85, 0, 1, "battery/charging/lock");
publish_boolean(regs, 85, 1, 2, "battery/discharging/lock");
publish_boolean(regs, 85, 2, 4, "emergency/ready");
publish_boolean(regs, 85, 3, 8, "battery/weather_regulation");
publish_boolean(regs, 85, 4, 16, "grid/limit");
publish_boolean(regs, 85, 5, 32, "idle_period/charging/active");
publish_boolean(regs, 85, 6, 64, "idle_period/discharging/active");
olds[85] = regs[85];
}
if (regs[88] & 1) {
publish_number_if_changed(regs, olds, F1, 78, "wallbox/total/power");
publish_number_if_changed(regs, olds, F1, 80, "wallbox/solar/power");
}
for (wallbox = 0; wallbox < 8; wallbox++) {
if ((regs[88 + wallbox] & 1) && (olds[88 + wallbox] != regs[88 + wallbox])) {
sprintf(tbuf, "wallbox/%d/available", wallbox);
publish_boolean(regs, 88 + wallbox, 0, 1, tbuf);
sprintf(tbuf, "wallbox/%d/sun_mode", wallbox);
publish_boolean(regs, 88 + wallbox, 1, 2, tbuf);
sprintf(tbuf, "wallbox/%d/ready", wallbox);
publish_boolean(regs, 88 + wallbox, 2, 4, tbuf);
sprintf(tbuf, "wallbox/%d/charging", wallbox);
publish_boolean(regs, 88 + wallbox, 3, 8, tbuf);
sprintf(tbuf, "wallbox/%d/1phase", wallbox);
publish_boolean(regs, 88 + wallbox, 12, 4096, tbuf);
olds[88 + wallbox] = regs[88 + wallbox];
}
}
if (olds[70] != regs[70]) {
if (regs[71] >= 0) {
if ((regs[70] == 0) && (regs[83] == 0)) {
if (strcmp(bstate, "EMPTY")) {
publish("battery/state", "EMPTY");
if (!force) strcpy(bstate, "EMPTY");
}
} else if ((regs[70] == 0) && (regs[83] == 100)) {
if (strcmp(bstate, "FULL")) {
publish("battery/state", "FULL");
if (!force) strcpy(bstate, "FULL");
}
} else if (regs[70] == 0) {
if (strcmp(bstate, "PENDING")) {
publish("battery/state", "PENDING");
if (!force) strcpy(bstate, "PENDING");
}
} else {
if (strcmp(bstate, "CHARGING")) {
publish("battery/state", "CHARGING");
if (!force) strcpy(bstate, "CHARGING");
}
}
} else {
if (strcmp(bstate, "DISCHARGING")) {
publish("battery/state", "DISCHARGING");
if (!force) strcpy(bstate, "DISCHARGING");
}
}
}
if (olds[84] != regs[84]) {
if (regs[84] == 1)
publish("emergency/mode", "ACTIVE");
else if (regs[84] == 2)
publish("emergency/mode", "INACTIVE");
else if (regs[84] == 4)
publish("emergency/mode", "CHECK_MOTOR_SWITCH");
else
publish("emergency/mode", "N/A");
olds[84] = regs[84];
}
publish_string_if_changed(regs, &manufacturer[0], 4, 16, "manufacturer");
publish_string_if_changed(regs, &model[0], 20, 16, "model");
publish_string_if_changed(regs, &serial_number[0], 36, 16, "serial_number");
publish_string_if_changed(regs, &firmware[0], 52, 16, "firmware");
if (olds[74] != regs[74]) {
if (regs[75] < 0) {
if (strcmp(gstate, "IN")) {
publish("grid/state", "IN");
if (!force) strcpy(gstate, "IN");
}
} else {
if (strcmp(gstate, "OUT")) {
publish("grid/state", "OUT");
if (!force) strcpy(gstate, "OUT");
}
}
}
for (i = 0; i < pool_length; i++) {
publish_number_if_changed(regs, olds, pool[i].format, pool[i].reg, pool[i].topic);
}
sleep(interval);
}
if (ctx) modbus_close(ctx);
if (ctx) modbus_free(ctx);
if (regs) free(regs);
if (olds) free(olds);
mosquitto_lib_cleanup();
exit(EXIT_SUCCESS);
}