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Updated Tips (markdown)

Michael Ingraham 2019-09-19 11:10:09 -04:00
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Tips.md

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## 3D Printed Cases
- [**Thingiverse**](https://www.thingiverse.com/search?q=tasmota&dwh=375b8ac9ddc286e)
- [**Yeggi**](https://www.yeggi.com/q/sonoff/)
## [**Theo's Tips**](Theo's-Tasmota-Tips)
## Obtaining the IP address of a Tasmota device
- The network name is be `<MQTT_TOPIC>-<last 4 decimal chars of MAC address>`. The default name is `sonoff-xxxx`.
- Use the `Status 5` command
## Available Characters for HOSTNAME
- 24 chars max
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> ASSUMPTIONS
> 1. A "name" (Net, Host, Gateway, or Domain name) is a text string up to 24 characters drawn from the alphabet (A-Z), digits (0-9), minus sign (-), and period (.). Note that periods are only allowed when they serve to delimit components of "domain style names". (See RFC-921, "Domain Name System Implementation Schedule", for background). No blank or space characters are permitted as part of a name. No distinction is made between upper and lower case. The first character must be an alpha character. The last character must not be a minus sign or period. A host which serves as a GATEWAY should have "-GATEWAY" or "-GW" as part of its name. Hosts which do not serve as Internet gateways should not use "-GATEWAY" and "-GW" as part of their names. A host which is a TAC should have "-TAC" as the last part of its host name, if it is a DoD host. Single character names or nicknames are not allowed.
## Topic, GroupTopic, and FallBack Topic
Initially I had one MQTT configurable topic planned called TOPIC but soon found out that when two sonoffs come online with the same topic this would be a challenge at least...
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- To stop saving power changes only to Flash or Spiffs use command ```SetOption0 off```. This will disable the relay from returning to the same state after power on UNLESS you use the MQTT retain flag in which case the MQTT broker will send the last known MQTT state on restart or power on. The command ```ButtonRetain on``` will configure the button to send a MQTT command with Topic and the MQTT retain flag set.
## 3D Printed Cases
- [**Thingiverse**](https://www.thingiverse.com/search?q=tasmota&dwh=375b8ac9ddc286e)
- [**Yeggi**](https://www.yeggi.com/q/sonoff/)