diff --git a/NEWS b/NEWS
index 7c03239..3fabd4d 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,43 @@
+Version 0.7.0 (2020-05-07)
+==========================
+
+The main highlight of the v0.7.0 release is the introduction of the new
+I/O interface. With this common interface, the dive computer backends
+can more easily use different I/O implementations at runtime, including
+an application defined one. This is needed to support Bluetooth Low
+Energy (BLE), for which there is no built-in implementation available.
+
+Due to the fundamental changes to the I/O layer, this release is not
+backwards compatible.
+
+New features:
+
+ * A new I/O interface
+ * Add support for new backends:
+    - goa: Cressi Goa and Cartesio
+    - divecomputereu: Tecdiving DiveComputer.eu
+    - extreme: McLean Extreme
+    - lynx: Liquivision Xen, Xeo, Lynx and Kaon
+    - sp2: Sporasub SP2
+ * Add support for many new devices:
+    - Aqualung: i100, i200C, i300C, i470TC, i550C, i770R
+    - Heinrichs Weikamp: OSTC 2 TR
+    - Mares: Genius, Horizon, Quad Air, Smart Air
+    - Oceanic: Geo 4.0, Pro Plus 4, Pro Plus X, Veo 4.0
+    - Ratio: iDive Color, iX3M GPS, iX3M 2021
+    - Scubapro: A1, A2, Aladin H Matrix, G2 Console, G2 HUD
+    - Seac: Guru, Jack
+    - Shearwater: Peregrine, Teric
+    - Sherwood: Amphos 2.0, Beacon, Sage, Wisdom 4
+    - Suunto: D5, EON Steel Black
+    - Tusa: Talis
+ * Firmware upgrade support for the Ratio computers
+ * Support for semi-closed circuit diving
+
+Removed/changed features:
+
+ * Unify the Uwatec Smart, Meridian and G2 backends
+
 Version 0.6.0 (2017-11-24)
 ==========================
 
diff --git a/configure.ac b/configure.ac
index 9b43b4b..718f95b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 m4_define([dc_version_major],[0])
 m4_define([dc_version_minor],[7])
 m4_define([dc_version_micro],[0])
-m4_define([dc_version_suffix],[devel-Subsurface-NG])
+m4_define([dc_version_suffix],[Subsurface-NG])
 m4_define([dc_version],dc_version_major.dc_version_minor.dc_version_micro[]m4_ifset([dc_version_suffix],-[dc_version_suffix]))
 
 # Libtool versioning.
diff --git a/examples/common.c b/examples/common.c
index 1972cfa..345dfec 100644
--- a/examples/common.c
+++ b/examples/common.c
@@ -91,7 +91,7 @@ static const backend_table_t g_backends[] = {
 	{"idive",       DC_FAMILY_DIVESYSTEM_IDIVE,    0x03},
 	{"cochran",     DC_FAMILY_COCHRAN_COMMANDER,   0},
 	{"divecomputereu", DC_FAMILY_TECDIVING_DIVECOMPUTEREU, 0},
-	{"mclean",      DC_FAMILY_MCLEAN_EXTREME,      0},
+	{"extreme",     DC_FAMILY_MCLEAN_EXTREME,      0},
 	{"lynx",        DC_FAMILY_LIQUIVISION_LYNX,    0},
 	{"sp2",         DC_FAMILY_SPORASUB_SP2,        0},
 
diff --git a/src/descriptor.c b/src/descriptor.c
index a25ebee..00b9f09 100644
--- a/src/descriptor.c
+++ b/src/descriptor.c
@@ -270,6 +270,7 @@ static const dc_descriptor_t g_descriptors[] = {
 	{"Oceanic",  "Veo 4.0",             DC_FAMILY_OCEANIC_ATOM2, 0x4654, DC_TRANSPORT_SERIAL | DC_TRANSPORT_BLE, dc_filter_oceanic},
 	{"Sherwood", "Wisdom 4",            DC_FAMILY_OCEANIC_ATOM2, 0x4655, DC_TRANSPORT_SERIAL | DC_TRANSPORT_BLE, dc_filter_oceanic},
 	{"Oceanic",  "Pro Plus 4",          DC_FAMILY_OCEANIC_ATOM2, 0x4656, DC_TRANSPORT_SERIAL | DC_TRANSPORT_BLE, dc_filter_oceanic},
+	{"Sherwood", "Amphos 2.0",          DC_FAMILY_OCEANIC_ATOM2, 0x4657, DC_TRANSPORT_SERIAL, NULL},
 	{"Sherwood", "Beacon",              DC_FAMILY_OCEANIC_ATOM2, 0x4742, DC_TRANSPORT_SERIAL | DC_TRANSPORT_BLE, dc_filter_oceanic},
 	{"Aqualung", "i470TC",              DC_FAMILY_OCEANIC_ATOM2, 0x4743, DC_TRANSPORT_SERIAL | DC_TRANSPORT_BLE, dc_filter_oceanic},
 	/* Mares Nemo */
diff --git a/src/oceanic_atom2.c b/src/oceanic_atom2.c
index 26f5c83..ca0b095 100644
--- a/src/oceanic_atom2.c
+++ b/src/oceanic_atom2.c
@@ -459,6 +459,7 @@ static const oceanic_common_version_t versions[] = {
 	{"AMPHOAIR \0\0 512K", 0,      &tusa_zenair_layout},
 	{"VOYAGE2G \0\0 512K", 0,      &tusa_zenair_layout},
 	{"TUSTALIS \0\0 512K", 0,      &tusa_zenair_layout},
+	{"AMPHOS20 \0\0 512K", 0,      &tusa_zenair_layout},
 
 	{"REACPRO2 \0\0 512K", 0,      &oceanic_reactpro_layout},
 
diff --git a/src/oceanic_atom2_parser.c b/src/oceanic_atom2_parser.c
index 64be773..fe7c030 100644
--- a/src/oceanic_atom2_parser.c
+++ b/src/oceanic_atom2_parser.c
@@ -99,6 +99,7 @@
 #define VEO40       0x4654
 #define WISDOM4     0x4655
 #define PROPLUS4    0x4656
+#define AMPHOS2     0x4657
 #define BEACON      0x4742
 #define I470TC      0x4743
 
@@ -316,6 +317,7 @@ oceanic_atom2_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetim
 		case AMPHOSAIR:
 		case VOYAGER2G:
 		case TALIS:
+		case AMPHOS2:
 			datetime->year   = (p[3] & 0x1F) + 2000;
 			datetime->month  = (p[7] & 0xF0) >> 4;
 			datetime->day    = ((p[3] & 0x80) >> 3) + ((p[5] & 0xF0) >> 4);
@@ -949,7 +951,8 @@ oceanic_atom2_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_
 						parser->model == PROPLUS4 || parser->model == WISDOM4)
 						sign = (~data[offset + 5] & 0x04) >> 2;
 					else if (parser->model == VOYAGER2G || parser->model == AMPHOS ||
-						parser->model == AMPHOSAIR || parser->model == ZENAIR)
+						parser->model == AMPHOSAIR || parser->model == ZENAIR ||
+						parser->model == AMPHOS2)
 						sign = (data[offset + 5] & 0x04) >> 2;
 					else if (parser->model == ATOM2 || parser->model == PROPLUS21 ||
 						parser->model == EPICA || parser->model == EPICB ||