DSD TECH SH-BT04B 4-kanaals Bluetooth-relais V2 Ondersteuningstimer en beveiligingscode

Watch out. The pinout indicated on the enclosure has the wrong +/- layout. On the PCB it says the other way around, which is right. Careful, cause it may blow the capacitor on the board!Once connected right, the switch works just fine. Pity that there is no timer function in the app.

Positive and negative symbols wrong way round and fried my unit because of it

Absolutely junk bought 3 different bluetooth products that was manufactured by DSD TECH and all 3 was junk one would work if powered by 5v but not 12v the other 2 would connect to bluetooth but would not cycle the relays Absolutely junk do not buy this trash

I had read several reports of bad or no customer support from DSD Tech. Perhaps they also read those reviews and did something about it. For a Far-Eastern volume manufacturer of electronic boards, you expect not to get the same level of support as you can get from a local supplier or store. I am glad to report that with DSD Tech (DongGuan DESHIDE TECHNOLOGY) my experience is the complete opposite of what other reviews have reported. I first bought their 2 relay Bluetooth controlled relay board (SH-BT02B) and then, this 4-relay (SH-BT04B) model. In both cases, Google Play refused to load the matching App from the Play Store to my Android 12 LG smartphone. When I contacted DSD Tech's customer support, they responded in a few hours and provided me with the apk files so that I could load them myself - the Apps are straightforward and work - I can switch the relays on or off from up to 10 metres away. The board construction is first class (as we expect with robot-built boards these days). The fact that these boards come in a housing (a weatherproof one in the case of the 2-relay board) for less than 20 Euros/dollars/pounds, simply amazes me. This is the effect of the boom of the Internet-of-Things revolution that allows mass production on such a big scale. In any case, I will be using these as part of some Amateur (Ham) radio projects and I could not build the same boards for the price I have bought the complete boards, with free software, and housings for!My only complaint (this applies to almost all electronic boards these days) is that what documentation that comes with the units is printed so small to not be readable without a magnifying glass! At least in the case of DSD Tech, the documentation is also online on their website.Regards Ed - Bavaria, Germany.

Un beau boîtier!!! Rien ne fonctionne. A ne pas acheter. Je vais d'ailleurs demander le remboursement.L'application DSD TECH BLUETOOTH sur google play ne connecte pas le module SH-BT04B au bluetooth. L'application recommandée DSD TECH SWITCH n'existe pas sur Google play. Seul quand le module est alimenté les 4 boutons poussoirs activent les relais. Les 4 entrées IN1 à IN4 ne déclenchent pas le trigger des relais comme indiqué dans la documentation soit au niveau haut 5v soit au niveau bas suivant l'état de TH1 !!! Bref à éviter !!!

Modulo Bluetooth funzionante. Comodo per barra DIN e cablagggio. Manca documentaz. tecnica per morsetti input. Scomodo perchè consiste di due pagine per settare la funzione timer; così devi ogni volta cambiare videata sul cell.Scomodo perchè scaduta la temporizzazione il relè cade (OFF) ma il tempo non rimane memorizzato e devi ritornare a ri-settarlo ogni volta. (quando basterebbe ripremere lo stesso pulsante per riavere lo stesso servizio.)Non riesco a usare i 4 input esterni. Per eccitare il fotoaccoppiatore interno uso il morsetto "Ground" di fianco ai 4 di input ma non succede niente. Qualcuno sa come devo fare?Grazie anticipatamente.