# Device

A Device represents your physical DTM devices which are installed at locations to collect foot traffic data

| Field                   | Type   | Required | Example              | Description |
| ----------------------- | ------ | -------- | -------------------- | ----------- |
| serial\_number          | string | No       | AA000000             |             |
| device\_type\_name      | string | No       | DTM                  |             |
| board\_id               | string | No       | 05555ee6f77c888e     |             |
| firmware\_version\_name | string | No       | 1.0.0                |             |
| last\_checkin\_at       | string | No       | 2021-10-10T00:00:00Z |             |
| update\_interval\_s     | number | No       | 3000                 |             |