* The beacon is redirecting people to a web page - so they need internet access! WiFi or phone signal

* Use audio on the page you link to - it means people get to look UP not down at their phones

* The title of the page shows up in the Physical Web app, you could consider putting your trail name and number right there in the page:

GSM Trail 1: Datum Point

* Have some long-range and some short-range beacons, so people find things easily

Long range for approximate location only, short range (low power) for specific objects

* Have a beacon ‘test point’ (could be a long range beacon) at the beginning of the trail, let people start there so they know it is working beforehand

* Use a sign-up form for more information just down at the bottom of each page, this will allow people who are fully engaged to register for more information

* Don’t use the double sided sticky tape often provided with beacons - this leaves a mess, or will eventually flake off the wall.

* Instead, use cable ties and lightweight ratchet straps

* For lowering things down from a ceiling, don't use nylon for heavy beacons, but instead nylon with stainless steel core

* Place them carefully - you need to consider whether a phone will be able to ‘see’ them in a line of sight sense. Consider that a beacon’s signal can travel through one person and still be visible, but not more

* Recommendation for location (e.g. in an app): Make sure you have three beacons in sight at any point that you want to locate someone

* Consider using a large number of beacons set to broadcast at a lower power (short range) with the same information to create a large beacon ‘bubble’ around an object

* Don’t stick them directly to concrete walls, or anything with metal in them (eg. girders). Instead, put them inside on the top of another plastic box (minimum 5cm in height) and stick the bottom of that box to the wall. This makes sure the beacon’s signal is not decreased too much by the adjacent wall

* If placing beacons in the corner of a room, mount them 25-50cm from the actual corner (in each direction)

 * Mounting beacons high up can help people ‘see’ them, especially in a crowded room

Higher is not always better though - if the roof is very high, beware.

The sweet spot is about 2-2.5m above the ground. Beacons broadcasting at higher power could be as high as half of the beacon's straight line range

* Have loan devices available if you want a wider audience to be able to engage with your material

- Buy cases that will allow people to drop them (assume 1.5m drop is common!)

 - Think about theft detection and how you can charge them overnight

 - Similar challenges to audioguides - in fact modern smartphones might actually be cheaper than purpose built audio guides.

 Thanks to Milosch Meriac and Jonathan Austin.