Inclusion Criteria:  Diagnosis of diabetes mellitus types 1 or 2 Aged 18 years or older Have loss of protective sensation based on the presence of peripheral neuropathy (Vibration Perception Threshold (VPT) ≥ 25V on either foot) Have a recent history of a DFU (i.e. an ulcer, defined as cutaneous erosion through the dermis on the foot) which was present for at least 2 weeks and has healed within 2-18 months before entry into the study Ability to provide informed consent Able to walk independently for 10m or more The patient has foot care from a podiatrist or is willing to undergo foot care by a podiatrist Access to a mobile phone so able to receive text notifications, or access to a landline to receive telephone call notifications.  Exclusion Criteria:  Active foot ulceration or open amputation sites An ulcer that has deemed to have healed within the 2 months prior to entry into the study Weight, when fully clothed, of greater than 150kg. Active Charcot neuro-osteoarthropathy Active foot infection Any history of lower limb amputation Significant Peripheral Arterial Disease (PAD) defined as history of revascularisation or absence of foot pulses Concomitant severe physical or mental condition(s) that limit the ability to follow instructions for the study, based on the clinical judgment by the physician. This includes the inability to use DFS, without having a carer who can perform the temperature measurements