We proposed and developed a "one-stop service system to support protected horticultural production" in greenhouses based on the working standard for the Ubiquitous Environment Control System (UECS) standard. To record and share crop cultivation information in the form of an electronic field note, we developed and tested two applications based on the Android platform and the extended UECS communication protocol (UECS-CCM). We named the applications the UECS tweeting application (Tsubuyaki-appli) and the UECS tweet-sharing application (Kyoyu-appli). Tsubuyaki-appli sends extended UECS-CCM packets over a greenhouse local area network (LAN). The packets include a photo of the greenhouse crop and a short description, and are transmitted using mobile devices such as an Android smartphone. Kyoyu-appli receives the extended UECS-CCM packets and displays the received information by using a social network service interface. Our testing of both applications revealed that they promoted sharing of information among greenhouse workers, with the only requirement being a low-cost Android device. We expect that such applications will lead to further advances in greenhouse crop production technology.