diff --git a/lib/airspy/airspy_source_c.cc b/lib/airspy/airspy_source_c.cc
index 25f73d4..52b1d81 100644
--- a/lib/airspy/airspy_source_c.cc
+++ b/lib/airspy/airspy_source_c.cc
@@ -90,12 +90,25 @@ airspy_source_c::airspy_source_c (const std::string &args)
_vga_gain(0),
_bandwidth(0)
{
- int ret;
+ int ret;
+ _dev = NULL;
dict_t dict = params_to_dict(args);
- _dev = NULL;
- ret = airspy_open( &_dev );
+ // the block below allows one to open airspy by serial number
+ // 2016-Apr-5 - by Lawrence Glaister VE7IT ve7it@shaw.ca
+ // (allowing multiple airspy source blocks to be used) Note: each airspy should be
+ // plugged into its own USB bus controller to support the high data rates involved.
+ // osmocom Source block usage: Device arguments: airspy=0x644064DC317C1FCD
+ // if no device arguments are given or s/n=0, the first found airspy device will be used
+ // use airspy_info utility to identify device serial number strings
+ uint64_t sn;
+ std::stringstream ss;
+ ss << std::hex << dict["airspy"];
+ ss >> sn;
+ std::cerr << "Attempting to open airspy by s/n= "
+ << boost::format("0x%016X") % (sn) << std::endl;
+ ret = airspy_open_sn( &_dev, sn );
AIRSPY_THROW_ON_ERROR(ret, "Failed to open AirSpy device")
uint8_t board_id;
@@ -106,11 +119,15 @@ airspy_source_c::airspy_source_c (const std::string &args)
memset(version, 0, sizeof(version));
ret = airspy_version_string_read( _dev, version, sizeof(version));
AIRSPY_THROW_ON_ERROR(ret, "Failed to read version string")
-#if 0
+
airspy_read_partid_serialno_t part_serial;
ret = airspy_board_partid_serialno_read( _dev, &part_serial );
AIRSPY_THROW_ON_ERROR(ret, "Failed to read serial number")
-#endif
+ std::cerr << "Opened Device Serial Number= "
+ << boost::format("0x%08X") % (part_serial.serial_no[2])
+ << boost::format("%08X") % (part_serial.serial_no[3])
+ << std::endl;
+
uint32_t num_rates;
airspy_get_samplerates(_dev, &num_rates, 0);
uint32_t *samplerates = (uint32_t *) malloc(num_rates * sizeof(uint32_t));
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