Dear All, i tried to get temperature and humid from DHT11. I tried the
information to have a makefile and to use saul for dht. However using
physical phy variable i could only gather temperature. Dht also measures
humidity. Do you know how to get more than one measurement if the sensor
has multi purpose capabilities?
My code as follows;
static saul_reg_t* saul_dht;
saul_dht = saul_reg_find_name("dht");
int res = saul_reg_read(saul_dht, &phy);
if (res)
printf("temperature: %d %d %d %d %d C\n",
phy.val[0],phy.val[1],phy.val[2],phy.unit,phy.scale);
else
printf("Sensor read failure: %d\n", res);
I think that there must be humidity value in phyval 1 or phyval 2 ?
21 Mar 2019 Per 11:35 tarihinde Ken Bannister <[email protected]> şunu yazdı:
> Excellent! I defer to others on config location, as I have no expertise at
> that level.
> On 3/21/19 1:24 AM, Philipp Blum wrote:
>
> Thanks, works fine. I changed the PIN config in the driver. I am not
> really happy with it. So, where to place the pin config instead? Should I
> place it in my boards configuration?
>
> Am 2019-03-20 15:23, schrieb Ken Bannister:
>
> Hi Philipp,
>
> I created a similar simple data collection app [1]. It uses SAUL with an
> MCP9808 temp sensor (JC 42.4 compliant), and of course CoAP. ;-) Start with
> the README. Then look for 'saul' in Makefile and in main.c main() and
> _run_sensor_loop().
>
> Ken
>
> [1] https://github.com/kb2ma/riot-data-collector
>
>
> On 3/20/19 1:04 PM, Philipp Blum wrote:
>
> Hi,
>
> I just want to use the DHT11 sensor. I know that RIOT has an abstraction
> layer for sensors, which is really nice. My problem is just: How to use it?
> I have a server on my device which accepts UDP packets. The server should
> read the sensor data on a regular base, caches them and sends them back
> when asked. So, simple as that. Probably I have add the modules for my
> driver and saul, right? So my Makefile should look like this
>
> USEMDOULE += saul
>
> USEMODULE += dht
>
> The dht driver already has confgurations, which I need to override, since
> the pins are not correct. Should I just do the following in my application?
>
> #undef DHT_PARAM_PIN
>
> #define DHT_PARAM_PIN (GPIO_PIN(0, 12))
>
> or should I define the DHT_PARAMS? When the setup is done, I probably just
> need to use saul itself with:
>
> const char temp_sensor_name[] = "dht"; phydat_t temp_data; saul_reg_t *
> temp_sensor_reg = saul_reg_find_name(temp_sensor_name);
> saul_reg_read(temp_sensor_reg, &temp_data);
>
> right? thanks for the help :)
>
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