Electromagnetic Field (also known as EMF, or EMF Camp) is a camping festival in the UK, held every two years, for hackers, geeks, engineers and scientists.[1] It features talks and workshops covering a wide variety of topics.[2] EMF is a non-profit event run entirely by a team of volunteers.[3]
Attendees of EMF receive an electronic conference badge, funded by sponsorship, which in 2014 included an LCD screen, Arduino-compatible microcontroller, and a radio transceiver.[4]
History
The first Electromagnetic Field event was held in 2012 at Pineham in Milton Keynes, and completely sold out a 499-person capacity. Each tent at EMF 2012 was provided with power and the internet, via a 2.5 km direct microwave link to a data centre[5] which provided 370 Mbit/s[6] to the campsite. Over 50 speakers gave talks, including Ben Goldacre.[7]
In 2013, a smaller interim one-day event called Electromagnetic Wave was held in London on board the MS Stubnitz.[8]
The main event was held again in 2014 at Hounslow Hall Estate, Newton Longville (near Milton Keynes). Over 1,200 tickets were sold.[9] As with the 2012 event, internet was provided by a direct microwave link which provided 436 Mbit/s.[10] The entire event had over 100 talks, workshops and events with a separate track for children. Notable speakers included Tom Watson MP and Simon Singh.[11] In addition there were 45 'villages'[12] that ran their own workshops and events including silver smithing, wood turning and making stroopwafels.
The 2016 event was held on 5–7 August at Loseley Park, Guildford[13] with an attendance of over 1,600. The 1 Gbit/s internet connection was provided by fibre, and the on-site network had a 10 Gbit/s backbone.[14]
Since 2018, Electromagnetic Field has been held at Eastnor Castle Deer Park in Herefordshire.[15][16] The 2020 edition was cancelled due to the ongoing COVID-19 pandemic,[17][18] but the event resumed in 2022.[19]
Each event, up to and including the 2024 event had a custom, programmable, battery-powered badge.
For the first event in 2012 the badge was named TiLDA, based on an ATMega 32U4 and was Arduino-compatible.
The 2014 badge (TiLDA MKe) was an Arduino Due-compatible badge. It was the first to come with an LCD, and all subsequent EMF badges included an LCD screen. It included Accelerometer and Gyroscope sensors, along with a long-range wireless transceiver.[25]
The 2016 badge was named TiLDA MK3, and dropped Arduino-compatibility for sake of Micropython. It was built around the STM32L4 microcontroller, and included a WiFi module, gyroscope and magnetometer.[26][27]
The 2018 badge (TiLDA MK4) included a SIM800 GSM module and T9 number keypad.[28]
The 2022 badge was renamed to TiDAL.[29] It was a badge in a USB-C thumbdrive format, with an LCD screen, a joystick, and various buttons.[30]
For 2024, the event debuted the Tildagon badge, planned to be used for all future events alongside hardware "hexpansion" boards. The Tildagon badge is based on an Espressif ESP32-S3 with 2MB of RAM and 8MB of storage.[31]