433mhz, infrared IR to and from MQTT on ESP8266

kucau · August 29, 2017, 1:26pm

it works now. tq!

jxjhheric · August 30, 2017, 8:44am

i don’t catch the point， could you share your conf in HA？

clyra · August 30, 2017, 11:19am

Sure! I’m using it with:

sensor.yaml:

- platform: mqtt_room
  device_id: <your device mac>
  name: "Lyra"
  state_topic: "home/BTtoMQTT/room"
  away_timeout: 60

you may change the subjectBTtoMQTTRoom from “home/BTtoMQTT/room/casa”, to the name of your room. Since i just have one scanner I’m using “casa” (which means “home”).

jxjhheric · August 30, 2017, 10:31pm

If I have more than one nodemcu with Hm-10, such as 3 , every room owns one module, and I only have one ibeacon, can I use your conf and working well? They will update location correctly?

clyra · August 31, 2017, 1:05am

@jxjhheric good question and one that I intend to discover when my other hm-10 arrive. From reading the docs about mqttroom, yes, it should work correctly and homeassistant “should” update the location to the detector who sent the lowest distance. Maybe you have to add the “timeout” option which controls how much time the position is considered valid (but not yet “away”). If I got it right mqttroom do a similar job as the “room-assistant” or happy bubbles, but with a simpler algorithm.
Also this led to another question: if you can use “group” to your room locations! Let’s say you have “hall”, “living room” and “kitchen” but also wants to group them as “home”, so some automations use the room and others just “home”.
If you just want to know if the beacon is at home but not which room, you may just use the same subjectBTtoMQTTRoom topic to all of them.

jxjhheric · August 31, 2017, 1:57am

thanks for your reply

of course i want to know if the beacon is at which room not just at home，use “group” is good idea for automations

i’m newbie for the code，can i change the number below？

String mac = onedevice.substring(53,65);
String rssi = onedevice.substring(66,70);
float distance = rssi.toInt() / -10.0;
discResult = discResult.substring(78)

now i use @Petrica’s conf to track the RSSI ，but my miband’s RSSI is unstable when not moving，-82，-79，-75，-80…justlike this，can’t show the status correctly

clyra · August 31, 2017, 2:32am

Not sure what you want to do, but you may change this line:

float distance = rssi.toInt() / -10.0;

This line takes the rssi value and divides to -10 so you got a positive value which vaguely remember “meters”, so, -82, become “distance: 8.2”. Which also means that when you get closer to the mcu the signals increases (ex: from -80 to -60), and the distance decreases (ex: from 8.0 to 6.0). There’s no problem with a unstable RSSI as long as the RSSI read by the nearer mcu is better than the one read by the others. Maybe you can add/substract some value to one or other mcu if it has a better antenna and has a stronger/weaker signal than the others for the same real distance. Maybe you need to use room-assistant or happy bubbles as they use better algorithms to filter/adjust these values.

jxjhheric · August 31, 2017, 3:08am

got it

better algorithms get better values

i read this code https://github.com/home-assistant/home-assistant/raw/e09e102e7819012ebd909ede0245e3db0fd382be/homeassistant/components/sensor/mqtt_room.py

and find that one of contributors is mKeRix，he is also the author of room-assistant，maybe the algorithm of room_mqtt in ha is same as the “room-assistant” ?

clyra · August 31, 2017, 3:14am

No, it’s not. room assistant uses something called “Kalman filter” and mqtroom just do a simple distance comparison.

jxjhheric · August 31, 2017, 4:09am

@1technophile would we compatibility with the “room-assistant” or happy bubbles

1technophile · August 31, 2017, 5:25am

Following a previous post i was planning to make openmqttgateway compatible with happybubbles, but i m open to other solutions. It is very good that you explore how the beacon detector can be use with the gateway. I Will not do the job with all the presence server/module around, we have to select the best or the two bests.

jxjhheric · August 31, 2017, 5:28am

Glad to hear that, looking forward to seeing the best way for the gateway

marksev1 · August 31, 2017, 11:30am

Did you guys take a look at this: https://github.com/schollz/find

jxjhheric · September 1, 2017, 7:07am

i flash the modify ZgatewayBT.ino，in mqtt i got the id，mac，distance… but in HA，it’s always away when i moving the ibeacon.

clyra · September 1, 2017, 3:33pm

show us the modified code and the configuration, please. Are you using the three receptors?

jxjhheric · September 1, 2017, 9:44pm

It’s working now
I modified the distance formula for the correct distance

d = 10^((abs(RSSI) - A) / (10 * n))
d = distance to the sender [m]
A = absolute value of power at one meter distance to the sender [dBm]
n = path loss coe?cient

And now I have 2 receptors, it will change the room name when I move from one room to another

clyra · September 1, 2017, 10:40pm

Nice! Which values did you used to “A” and “n”? Or better yet, how did you calculate it?

jxjhheric · September 1, 2017, 11:09pm

Just test for myself,
A=70
N=2.5
This number is fit for me,
You can try some other number for yours

jxjhheric · September 1, 2017, 11:51pm

@1technophile something strange with my gateway,everytime i start the gateway , the mqtt server will receive:

 home/OpenMQTTGateway/LWT Online
 home/commands/MQTTto433 13981488

the second command turn my light on, gateway on light on gateway on light on… that’s not my expected

how can i solve that ？

teslas_moustache · September 2, 2017, 2:32am

What would have to be done to make this work with the Adafruit Feather HUZZAH?

I have some RF door sensors, and the Huzzah is the board that I have.

Thanks!