External documents and notes

[PSF1]

I'll write here the documentation and interesting information that maybe useful to this project:

• Arduino Audio kit: https://github.com/pschatzmann/arduino-audiokit
• Dev kit: https://github.com/Ai-Thinker-Open/ESP32-A1S-AudioKit
• Foro Aleman: https://forum-espuino-de.translate.goog/t/esp32-audio-kit-esp32-a1s/106?_x_tr_sl=auto&_x_tr_tl=es&_x_tr_hl=es&_x_tr_pto=wapp&_x_tr_hist=true
• ESP32-A1S pinout: https://forum.espuino.de/uploads/default/original/1X/70ec34948ab5d8a6142d9dbaeefeb9f712e32391.png
• Browser-based Online and Offline Hex Editing: http://hexed.it/

[PSF1]

Posible external screen solutions:

• https://es.aliexpress.com/item/33048962331.html?pdp_npi=2%40dis%21EUR%2117%2C24%E2%82%AC%2117%2C24%E2%82%AC%21%21%21%21%21%40211b5db216842752978964837e3135%2112000031555127814%21btf&_t=pvid%3A293da268-4c70-46b6-9999-6b3b0aa035a2&afTraceInfo=33048962331__pc__pcBridgePPC__xxxxxx__1684275298&spm=a2g0o.ppclist.product.mainProduct&gatewayAdapt=glo2esp
• https://es.aliexpress.com/item/1005004496543314.html?spm=a2g0o.detail.1000060.2.425a5f84k4chQg&gps-id=pcDetailBottomMoreThisSeller&scm=1007.13339.291025.0&scm_id=1007.13339.291025.0&scm-url=1007.13339.291025.0&pvid=f47d3f33-4df1-4592-bda1-ac9e92a9f843&_t=gps-id%3ApcDetailBottomMoreThisSeller%2Cscm-url%3A1007.13339.291025.0%2Cpvid%3Af47d3f33-4df1-4592-bda1-ac9e92a9f843%2Ctpp_buckets%3A668%232846%238114%231999&pdp_npi=3%40dis%21EUR%2124.15%2124.15%21%21%21%21%21%40211b5db216842753021494930e3135%2112000030128898262%21rec%21ES%21140664060&gatewayAdapt=glo2esp

• 

[PSF1]

IO Port expansions:

• https://www.nxp.com/docs/en/data-sheet/PCA9555.pdf
• https://forum-espuino-de.translate.goog/t/einsatz-des-port-expanders-pca9555/306?_x_tr_sl=auto&_x_tr_tl=es&_x_tr_hl=es&_x_tr_pto=wapp&_x_tr_hist=true
• https://es.aliexpress.com/item/1005005050872379.html?spm=a2g0o.productlist.main.49.32576e920YyDfi&algo_pvid=2d5b8775-ab40-4ded-a9fe-074e433d5ced&aem_p4p_detail=202305161543326006763170640500002224219&algo_exp_id=2d5b8775-ab40-4ded-a9fe-074e433d5ced-24&pdp_npi=3%40dis%21EUR%218.07%215.65%21%21%21%21%21%402145265416842770126352803d0768%2112000031457420019%21sea%21ES%211825655815&curPageLogUid=iY6z1cVMoDg4&ad_pvid=202305161543326006763170640500002224219_5&ad_pvid=202305161543326006763170640500002224219_5
• https://es.aliexpress.com/item/1005005444510645.html?spm=a2g0o.productlist.main.19.32576e920YyDfi&algo_pvid=2d5b8775-ab40-4ded-a9fe-074e433d5ced&aem_p4p_detail=202305161543326006763170640500002224219&algo_exp_id=2d5b8775-ab40-4ded-a9fe-074e433d5ced-9&pdp_npi=3%40dis%21EUR%211.39%211.32%21%21%21%21%21%402145265416842770126352803d0768%2112000033106053764%21sea%21ES%211825655815&curPageLogUid=ODsAAszyzMHU&ad_pvid=202305161543326006763170640500002224219_2&ad_pvid=202305161543326006763170640500002224219_2
• https://es.aliexpress.com/item/1005004996004241.html?spm=a2g0o.productlist.main.61.32576e920YyDfi&algo_pvid=2d5b8775-ab40-4ded-a9fe-074e433d5ced&algo_exp_id=2d5b8775-ab40-4ded-a9fe-074e433d5ced-30&pdp_npi=3%40dis%21EUR%217.38%215.9%21%21%21%21%21%402145265416842770126352803d0768%2112000031285879807%21sea%21ES%211825655815&curPageLogUid=sriRneF6gqxG

Search: https://es.aliexpress.com/w/wholesale-M%C3%B3dulo-de-expansi%C3%B3n-IO-GPIO-PCA9555.html?catId=0&initiative_id=SB_20230516145140&SearchText=M%C3%B3dulo+de+expansi%C3%B3n+IO+GPIO+PCA9555&spm=a2g0o.productlist.1000002.0