Company Profile
Guangdong Yunbai Technology Co., Ltd, founded in 2015 and headquartered in Dongguan, Guangdong Province, specializes in IOT technologies, Leveraging strong industry expertise and R&D capabilities,the company integrates software and hardware innovation to deliver end-to-end IOT solutions across sectors such as new energy vehicles, charging infrastructure, green energy, advanced manufacturing, and modern transportation.
Yunbai holds 26 core patents and 53 software copyrights. It is a member of the National information Security standardization Committee and has earned certifications including ASPICE Level 2, CMMI Level5, CCRC Level 3, and ISO standards, Yunbai operates 6 subsidiaries across Mainland China, Hong Kong SAR, China, Singapore, Brazil, and other regions, serving global enterprises in the automotive, charging, and energy sectors.
Main Business
- INTERNATIONAL IOT SIM CARDS
- HARDWARE PRODUCTS
Main Products
INTERNATIONAL IOT SIM CARDS
Description：
With 11 years of deep industry expertise, we cover over 180 countries and regions worldwide.
We offer both local overseas and roaming solutions, backed by multiple resource guarantees to ensure reliable connectivity and mitigate single-network risks. A wide range of data plans is available, from low to high traffic, with support for customized product solutions to meet diverse application scenarios and needs.
Free test samples of domestic and international IOT SIM cards are available upon request.
Description：
ESIM technology support enables global coverage with a single card or even a cardless solution.
With ESIM technology, remote configuration is achieved, allowing on‑demand download of profile resources for target countries.
Devices can freely switch between different networks for different data connections.
Supports SGP.22/32 standards and uses GSMA standard ESIM cards.
HARDWARE PRODUCTS: YBM307GB 4G DTU
Description：
The DTU product is based on the LTE network, enabling data collection (such as on/off status, cooling and heating working modes, set temperature, wind speed, etc.), transmission, and remote management and control via the cloud platform.
It is mainly used in the HVAC industry and supports modbus protocols to connect industrial air conditioners, water heaters and other equipment through RS485/RS232/TTL interfaces.
HARDWARE PRODUCTS: YBM780ELGA 4G DTU
Description：
The DTU product is based on the LTE network, enabling data collection (such as charging status, battery capacity, charging duration, battery voltage, etc.), transmission, and remote management and control via the cloud platform.
It is mainly used in the new energy charging pile industry. It is generally inserted on the main board of the charging pile through the TTL interface and communicates through the AT command.