int Dust::get(char *buf, size_t size)
{
item_t res;
unsigned long t;
const int interval = 30000;
if (0 == m_start)
m_start = millis();
t = millis();
if (m_start > t)
m_start = t;
m_occupancy += pulseIn(m_pin, LOW);
if(t - m_start >= interval) {
float ratio = m_occupancy / (interval * 10.0);
float concentration = 1.1 * pow(ratio, 3) - 3.8 * pow(ratio, 2) + 520 * ratio + 0.62;
m_result = (int)(concentration * 0.0207916725464941);
m_occupancy = 0;
m_start = t;
}
res = itemNew("dust", String(m_result));
return itemCopy(res, buf, size);
}
bool mySqlGetItems(MySQL *self, Item **_items) {
MYSQL_ROW row;
Item *items = *_items;
dbg("mySqlGetItems count: %d", mysql_num_rows(self->result));
uint64_t itemId;
uint32_t itemType;
uint32_t amount;
uint8_t inventoryIndex;
for (int i = 0; (row = mysql_fetch_row(self->result)); i++) {
dbg("preparing item %d", i);
itemId = strtoull(row[MYSQL_ITEM_FIELD_item_id], NULL, 10);
itemType = strtoul(row[MYSQL_ITEM_FIELD_item_type], NULL, 10);
amount = strtoul(row[MYSQL_ITEM_FIELD_amount], NULL, 10);
inventoryIndex = strtoul(row[MYSQL_ITEM_FIELD_position_in_inventory], NULL, 10);
Item *item = itemNew(itemId, itemType, amount, inventoryIndex);
dbg("item %d initialized", i);
switch (itemId) {
case 1: {
item->itemCategory = INVENTORY_CAT_ARMOR;
break;
}
case 2: {
item->itemCategory = INVENTORY_CAT_WEAPON;
break;
}
case 3: {
item->itemCategory = INVENTORY_CAT_ARMOR;
break;
}
}
items[i] = *item;
}
return true;
}
int HT::get(char *buf, size_t size)
{
item_t res;
uint8_t cnt = 7;
uint8_t idx = 0;
uint8_t data[5];
unsigned int loopCnt = 10000;
for(int i = 0; i < 5; i++)
data[i] = 0;
pinMode(m_pin, OUTPUT);
digitalWrite(m_pin, LOW);
delay(18);
digitalWrite(m_pin, HIGH);
delayMicroseconds(40);
pinMode(m_pin, INPUT);
loopCnt = 10000;
while(digitalRead(m_pin) == LOW)
if (loopCnt-- == 0)
return 0;
loopCnt = 10000;
while(digitalRead(m_pin) == HIGH)
if (loopCnt-- == 0)
return 0;
for(int bits = 0; bits < 40; bits++) {
loopCnt = 10000;
while(digitalRead(m_pin) == LOW)
if (loopCnt-- == 0)
return 0;
unsigned long t = micros();
loopCnt = 10000;
while(digitalRead(m_pin) == HIGH)
if (loopCnt-- == 0)
return 0;
if ((micros() - t) > 40)
data[idx] |= (1 << cnt);
if (cnt == 0) {
cnt = 7;
idx++;
} else
cnt--;
}
delayMicroseconds(100);
pinMode(m_pin, OUTPUT);
digitalWrite(m_pin, HIGH);
if(data[4] != data[0] + data[2])
return 0;
res = itemNew("humidity", String(data[0]));
res += itemNext("temperature", String(data[2]));
return itemCopy(res, buf, size);
}
