This is a one-group pilot study where Chinese immigrants who are English speaking with T2D from NYU Langone Health and NYU Brooklyn Family Health Center (Sunset Park) will be recruited.

To evaluate the estimation accuracy using eButton, researchers will collect carbohydrate data via weighing food by registered dietitian nutritionist (RDN) ("gold standard") (2 days/week at research labs) and food diaries by participants (2 days/week at research labs and 3 days/ week at participant home). Then, the estimated carb grams will be compared head to head among each other. Assessment will be at 0 and 2 weeks, including surveys and qualitative audio interview.

Inclusion Criteria:

• ≥18 years old
• Diagnosed with T2D at least one year prior
• Self-identified as first- or second-generation Chinese immigrants
• Feel comfortable communicating in English, the reason is that the questionnaires/surveys are validated in English
• Have a computer and internet connection

Exclusion Criteria:

• Plan frequent travel or vacations or plan to relocate in the next five weeks
• Have serious diabetes-related complications, physical illness, or mental illness (e.g., schizophrenia, bipolar disorder, or substance abuse) that would preclude participation
• Have severe cognitive impairments (e.g., dementia, intellectual disability)

Chinese Americans participants are targeted to test eButton accuracy is that most Chinese Americans live closely within the community (e.g., Chinatown) and use a handful of Asian stores as their main food sources, which reduces the complexity of their food choices. Thus, collecting data from this ethnic group can provide an in-depth validation of eButton closed-loop feedback concept without excessive experimental time.

Individual participant data that underlie the results reported in this article, after deidentification (text, tables, figures, and appendices).

Beginning 9 months and ending 36 months following article publication or as required by a condition of awards and agreements supporting the research

The investigator who proposed to use the data. Upon reasonable request. Requests should be directed to yaguang.zheng@nyu.edu. To gain access, data requestors will need to sign a data access agreement.