| 摘要 |
PROBLEM TO BE SOLVED: To provide a data communication mehtod and a temperature humidity transmission device which is capable of transmitting data, without being mutually synchronized with a transmitter and even when a transmission frequency is used by some other radio facilities. SOLUTION: In transmitting data, when a transmission frequency is monitored and is not being used (S18 is No), transmission is performed with its transmission frequency (S26). Also, when the transmission frequency is being used (S18 is Yes), the frequency is swtiched (S22) and, when the switched frequency is not being used, the transmission is performed with that frequency (S26). Moreover, when the transmission frequency and the switched frequency are being used for a specified time (S20 is Yes), a transmission cycle is delayed by half a communication time (S24), and the transmission is performed (S26). That is, by delaying transmission of other transmitter which is repeated every set cycle and transmitting, data transmission in enabled, without being synchronized between plural transmitters. |
