Alternative to DHT22 for simple temp solution?

Zedde · December 26, 2020, 11:28pm

So I have just purchased a Pi4 for my motorhome to control most of my electrics but after purchasing a DHT22 I have discovered that there is a problem with Adafruit libraries and cannot be used until fixed.

Im looking for simple/cheap alternatives to get temp readings that my heating/cooling can react to.

Thanks for any suggestions on this…im surprised the pi4/dht combo isnt mentioned in the official docs.

Thanks for any suggestions on this.

tom_l · December 27, 2020, 3:19am

1-wire DS18S20, https://www.home-assistant.io/integrations/onewire/

Or maybe one of the Bluetooth sensors from Xiaomi, https://www.home-assistant.io/integrations/mitemp_bt/

PW43575 · February 4, 2021, 10:44am

Hi

how do you run your Homeassistant in the motorhome?

Do you run it on a Hotspot?
???

Zedde · February 4, 2021, 11:14am

It’s mostly a local setup as far as controls go…

But for my motorhome network I have an Archer C50 router that I have flashed with OpenWrt. When parked near wifi (or switch on my phone hotspot) I can set the 2.4ghz band to connect to the wifi/hotspot and reshare locally over eth and 5ghz band to all my smarts.

So i have a constant local network for motorhome via 5hz and eth… then use the 2.4ghz band to connecto to an internet source when available which gets shared to the local network.

PW43575 · February 4, 2021, 12:32pm

Do you have any documentation or link to share to make the raspberrypi as local setup
i would love to run my accessory locally on Homeassisant

Zedde · February 4, 2021, 1:20pm

It runs locally as standard…just connect your homeassistant to your LAN via wifi or ethernet. Do the same with all of your smart devices. Then go to integrations in homeassistant and add all of your devices that are on the same network.

PW43575 · February 4, 2021, 1:41pm

last question…

i got one running at home on the ethernet but i trying to figure how could i run a second Home Assistant in my MotorHome when i am not connected to nay ethernet

how do you HomeAssisant on a Hotspot?

Zedde · February 4, 2021, 1:50pm

The simplest way would be to create a network config file on a usb with your hotpsot details in that homeassistant will read on startup…

github.com

home-assistant/operating-system/blob/e4bff62923b8412ce9ea051d43d00b2f674bad24/Documentation/network.md

# Network

## Configure Network
HassOS uses NetworkManager to control the host network. In future releases, you will be able to set up the configuration using the API/UI. Currently only a manual configuration using NetworkManager connection files is supported. Without a configuration file, the device will use DHCP by default. These network connection files can be placed on a USB drive and imported to the host as described in [Configuration][configuration-usb].

## Configuration Examples

You can read the [Official Manual][keyfile] or find many configuration examples across the internet. The system is read-only, if you don't want the IP address to change on every boot, you should set the UUID property with a generic [UUID4][uuid]. Inside `\CONFIG\network\` on the USB or SD, create a file called `my-network` and add the appropriate contents below:

### Default

We have a preinstalled connection profile:

```ini
[connection]
id=my-network
uuid=f62bf7c2-e565-49ff-bbfc-a4cf791e6add
type=802-3-ethernet

[ipv4]

This file has been truncated. show original

^ Think this should tell you how to do it

Zedde · February 4, 2021, 1:52pm

Actually…just follow the wifi instructions under ‘installation’ on this page, much simpler:

Spiro · February 4, 2021, 10:13pm

Tempsensor

Xiaomi sensors run off small battery(compact and no wires showing) and BMP(Not inside a project case yet so heats up bit quicker and cools down quicker running on Tasmota. May be prone to heat creep from ESP board if not seperated. Easy to offset temp) here on a ESP32 running off old phone charger. Both show up easily on Home Assistant.

Zedde · February 4, 2021, 10:49pm

Thanks Spiro, I actually went with some 1-wire sensors which have been great and cheap