Empirical values based on test results with keyfobs. Improvements
may be needed: storing the last operation results to handle situations
which high alert level is not received before disconnection. For this
case, shifting the thresholds may be an option.
---
proximity/monitor.c | 10 ++++++++--
1 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/proximity/monitor.c b/proximity/monitor.c
index 818325a..4b5a4ff 100644
--- a/proximity/monitor.c
+++ b/proximity/monitor.c
@@ -56,6 +56,9 @@
#define IMMEDIATE_TIMEOUT 5
+#define LOW_RSSI_THRESHOLD -60
+#define HIGH_RSSI_THRESHOLD -75
+
enum {
ALERT_NONE = 0,
ALERT_MILD,
@@ -221,7 +224,7 @@ static void tx_power_read_cb(guint8 status, const guint8 *pdu, guint16 plen,
struct btd_adapter *adapter = device_get_adapter(device);
uint8_t value;
int vlen;
- int8_t low = -20, high = -40;
+ int8_t low, high, txpower;
bdaddr_t dba;
if (status != 0) {
@@ -234,8 +237,11 @@ static void tx_power_read_cb(guint8 status, const guint8 *pdu, guint16 plen,
return;
}
- DBG("Tx Power Level: %02x", (int8_t) value);
+ txpower = (int8_t) value;
+ DBG("Tx Power Level: %d", txpower);
+ low = LOW_RSSI_THRESHOLD - txpower;
+ high = HIGH_RSSI_THRESHOLD - txpower;
device_get_address(device, &dba);
monitor->rssimon = btd_adapter_enable_rssi_monitor(adapter, &dba,
low, high, monitor_rssi_alert,
--
1.7.6
--
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