Technical Manual

61
Frame Types
DESCRIPTION This frame is sent by the device when the LED tool is inserted in the POWER con-
nector, or if the command B is issued in terminal mode. This frame is special in that
the destination address (DST) in the header is 0. This type of frame is not routable.
All devices having received this frame must reply in a random fashion with a Broad-
cast answer frame.
SEE ALSO Broadcast Answer frame.
Ping
ID 9
FORMAT The data frame body is empty.
DESCRIPTION This frame is used to request an answer from a device; it is used to check if the de-
vice is available and reports on various conditions of the remote. The addressed de-
vice must answer with a Pong frame. On an A733, this command can be initiated
from the terminal by means of the INFO command (see also “INFO” on page 52).
SEE ALSO Pong frame.
Pong
ID 10
FORMAT struct {
unsigned char RF_levelIn;
unsigned char RF_levelOut;
time_t RTC;
unsigned char version;
unsigned char clkfail;
unsigned char stackfail;
unsigned char WDT;
unsigned char batt;
unsigned char internalTemp;
time_t uptime;
unsigned char rssi;
unsigned char pmp_low;
unsigned char pmp_high;
unsigned char type;
unsigned int slot;
unsigned char samples;
} pong;
DESCRIPTION
The Pong frame is an answer to the Ping frame. In addition to informing a caller that
a remote is active, it carries some useful information about the device’s status:
• RF_levelIn is the left zero (it is a placeholder and will be filled by the first de-
vice receiving the frame).
• RF_levelOut is the RF level measured by the device when receiving the Ping
frame.
• RTC is the actual value of the remote’s Real Time Clock.